Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. The chemical symbol for Chlorine is Cl . Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Atomic Mass of Oxygen. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. The chemical symbol for Chlorine is Cl. Nickel is a silvery-white lustrous metal with a slight golden tinge. It has 17 positive charges and 17 negative charges, meaning that it is neutral overall. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. Thulium is an easily workable metal with a bright silvery-gray luster. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Caesium has physical and chemical properties similar to those of rubidium and potassium. You can do so by clicking the link here 7 Little Words April 17 2019. Find the numbers of protons, neutrons, and electrons. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. What are synonyms for atomic number 17? Cl-35 and Cl-37 are both stable isotopes with Cl-35 as the most abundant form (75.8%).Atomic Volume (cc/mol): 18.7, Specific Heat (@20°C J/g mol): 0.477 (Cl-Cl). Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. The chemical symbol for Chlorine is Cl. Atomic Number of Chlorine. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. Occurs widely in nature as sodium chloride in seawater, but it can be very dangerous depending on how it is used. Einsteinium is the seventh transuranic element, and an actinide. Francium is a highly radioactive metal that decays into astatine, radium, and radon. None of these. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. Lead is widely used as a gamma shield. The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. Chemically, indium is similar to gallium and thallium. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. They are equal to 16, 16 and 18, respectively. The chemical symbol for Fermium is Fm. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. At high pressure or low temperature: red to clear. The chemical symbol for Ruthenium is Ru. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present). Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Major advantage of lead shield is in its compactness due to its higher density. The chemical symbol for Antimony is Sb. The atomic number is the number of protons in the nucleus of an atom. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Sodium is a soft, silvery-white, highly reactive metal. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. Which elements have group number of 17? The chemical symbol for Erbium is Er. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. Gold is a transition metal and a group 11 element. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. Lawrencium is the final member of the actinide series. Hyperchloremia affects oxygen transport in the body. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Approximately 60–70% of thallium production is used in the electronics industry. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Find the number of protons. The chemical symbol for Platinum is Pt. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. ATOMIC NUMBER 17 Dictionary entry overview: What does atomic number 17 mean? Technetium is the lightest element whose isotopes are all radioactive; none are stable. It is used in cells to pump ions and is used in the stomach to make hydrochloric acid (HCl) for gastric juice. Chlorine gas was used as a chemical weapon during World War I. Chlorine is heavier than air and would form a deadly layer in low-lying foxholes and trenches. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. Number of neutrons + number of electrons. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Every chlorine atom has 17 protons and 17 electrons. If you are stuck at any of those puzzle, then you are here on the right place. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. What is Atomic Number Density - Definition. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. The chemical symbol for Cobalt is Co. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. This fact has key implications for the building up of the periodic table of elements. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. Tellurium is far more common in the universe as a whole than on Earth. The chemical symbol for Uranium is U. The chemical symbol for Einsteinium is Es. The chemical symbol for Zirconium is Zr. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. The chemical symbol for Technetium is Tc. Actinium is a soft, silvery-white radioactive metal. It is a member of the halogen group of elements, appearing between fluorine and bromine moving down the periodic table. Atomic weight of Chlorine is 35.45 u or g/mol. Neptunium is the first transuranic element. al. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. For example, the atomic mass of chlorine (Cl) is 35.45 amu because chlorine is composed of several isotopes, some (the majority) with an atomic mass of 35 amu (17 protons and 18 neutrons) and some with an atomic mass of 37 amu (17 protons and 20 neutrons). (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. If you continue to use this site we will assume that you are happy with it. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. The number of neutrons can be calculated by subracting the atomic number of Chlorine 17 by the mass number 35. 2) You may not distribute or commercially exploit the content, especially on another website. The chemical symbol for Thulium is Tm. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. In the periodic table, the elements are listed in order of increasing atomic number Z. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Discovery: Carl Wilhelm Scheele 1774 (Sweden), Word Origin: Greek: khloros: greenish-yellow. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. » Search results for 'atomic number 17' Yee yee! The nucleus is composed of protons and neutrons. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. The chemical symbol for Holmium is Ho. 20. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Cerium is the second element in the lanthanide series. 1. a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water) The chemical symbol for Niobium is Nb. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. 2 synonyms for atomic number 17: chlorine, Cl. Lead is a heavy metal that is denser than most common materials. Its boiling point is the lowest among all the elements. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Uranium is a silvery-white metal in the actinide series of the periodic table. 1 - st. letter C. 2 - st. letter H. 3 - st. letter L. 4 - st. letter O. The name samarium is after the mineral samarskite from which it was isolated. Uranium has the highest atomic weight of the primordially occurring elements. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. The chemical symbol for Polonium is Po. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. e.g. Number of protons + number of electrons. 22. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. It is occasionally found in native form as elemental crystals. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. It is even less abundant than the so-called rare earths. Our Website follows all legal requirements to protect your privacy. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. The chemical symbol for Mendelevium is Md. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Fermium is a member of the actinide series. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. Chlorine is used in the production of textiles, paper products, dyes, petroleum products, medicines, insecticides, disinfectants, foods, solvents, plastics, paints, and many other products. The chemical symbol for Terbium is Tb. The chemical symbol for Lead is Pb. Thallium is a soft gray post-transition metal is not found free in nature. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Hypochloremia can lead to cerebral dehydration. Start studying Atomic Numbers 1-18. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). Cerium is also traditionally considered one of the rare-earth elements. By using ThoughtCo, you accept our, 10 Chlorine Facts (Cl or Atomic Number 17), Indium Facts: Symbol In or Atomic Number 49, Tantalum Facts (Atomic Number 73 and Element Symbol Ta), Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College, Chlorine leaks in containers are detected, The most common natural chlorine compound on Earth is, Chlorine is the third most abundant element in the Earth's oceans. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Titanium can be used in surface condensers. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. The metal is found in the Earth’s crust in the pure, free elemental form (“native silver”), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Choose your element. The chemical symbol for Helium is He. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. The chemical symbol for Europium is Eu. Chlorine (Cl, atomic number 17) is a halogen element, poisonous greenish-yellow gas. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. The chemical symbol for Tantalum is Ta. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. The chemical symbol for Thallium is Tl. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. When we write the configuration we'll put all 17 electrons in orbitals around the nucleus of the Chlorine atom. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. For example, the atomic number of chlorine is 17. Because of its high chemical reactivity, barium is never found in nature as a free element. Francium is an alkali metal, that has one valence electron. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. It is one of the least reactive chemical elements and is solid under standard conditions. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. The chemical symbol for Hafnium is Hf. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. An atom has mass number 37 and atomic number 17. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. The chemical symbol for Radium is Ra. Chlorine is a member of the halogen group of elements and directly combines with almost all of the other elements. The chemical symbol for Ytterbium is Yb. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. The chemical symbol for Tellurium is Te. Chlorine has been used as a chemical warfare agent. Chlorine belongs to the halogen element group. The chemical symbol for Aluminum is Al. Chlorine much like other Halogens has antiseptic properties. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. It is a noble metal and a member of the platinum group. The chemical symbol for Thorium is Th. Only about 5×10−8% of all matter in the universe is europium. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. Chlorine is a yellow-green gas at room temperature. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. The atomic number of an element is the same as the number of protons in the atom. The chemical symbol for Promethium is Pm. Astatine is the rarest naturally occurring element on the Earth’s crust. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. 113Cd has specific absorption cross-section. The chemical symbol for Actinium is Ac. Atomic Number – Does it conserve in a nuclear reaction? Too much chloride leads to hyperchloremia. Hafnium’s large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). It is the heaviest essential mineral nutrient. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure.The chemical symbol for Chlorine is Cl. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. At ordinary temperature and pressure, chlorine is a pale. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Learn vocabulary, terms, and more with flashcards, games, and other study tools. See also: Atomic Number – Does it conserve in a nuclear reaction? Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Specifically, the chloride ion (Cl-) is key to metabolism. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. The chemical symbol for Calcium is Ca. The chemical symbol for Copper is Cu. Number of protons + number of neutrons. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. It is the fourth most common element in the Earth’s crust. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is used in swimming pools commonly and also making drinking water safe by killing bacteria. Every adventure world contain 20 groups and every group includes 5 exclusive puzzles. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. It is a non metal with the symbol Cl. A few breaths at a concentration of 1000 ppm is usually fatal. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. Thulium is the thirteenth and third-last element in the lanthanide series. 7 - st. letter N. 8 - st. letter E. Crosswords puzzles, an affordable and effective way to train the intellect, increase knowledge. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Predict its (a) valency, (b) formula of halide, (c) type of ion formed, asked May 12 in Atomic Theory, Periodic Classification, and Properties of Elements by Annu01 ( 49.5k points) The chemical symbol for Argon is Ar. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The chemical symbol for Plutonium is Pu. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. The liquid form will burn the skin. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. ***** - atomic number 17. word on "C". The chemical symbol for Caesium is Cs. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. The chemical symbol for Germanium is Ge. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. The Cookies Statement is part of our Privacy Policy. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. 5 - st. letter R. 6 - st. letter I. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. is a rare earth element with a metallic silver luster. The term nuclide is not synonymous with isotope, which is any member of a set of nuclides having the same atomic number but differing mass number. Atomic Number of Oxygen. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. It is a member of the halogen group of elements, appearing between fluorine and bromine moving down the periodic table. List the atomic symbol and element names. The chemical symbol for Sodium is Na. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. The chemical symbol for Arsenic is As. The chemical symbol for Iridium is Ir. The chemical symbol for Francium is Fr. 21. Alternatively, you can also calculate the atomic number, atomic mass, and charge. The chemical symbol for Scandium is Sc. The chemical symbol for Titanium is Ti. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. At ordinary temperature and pressure, chlorine is a pale. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. The chemical symbol for Lawrencium is Lr. chlorine has the atomic number 17 so its atom has 17 protons. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. A freshly exposed surface of pure copper has a reddish-orange color. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. Atomic Number 17 is belong to element of Chlorine.. Chemical symbol for Chlorine is Cl. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Holmium is a relatively soft and malleable silvery-white metal. The chemical symbol for Gadolinium is Gd. Discoverer: Davy, Sir H. and Thénard, L.-J. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. Humans can smell as low an amount as 3.5 ppm. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. Number of protons in Chlorine is 17. Elemental sulfur is a bright yellow crystalline solid at room temperature. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. The chemical symbol for Rhodium is Rh. Possible Solution: CHLORINE. Atomic number group 17 elements list. Biological Role: Chlorine is essential for life. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. All of its isotopes are radioactive. The chemical symbol for Astatine is At. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Arsenic is a metalloid. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. Although neodymium is classed as a rare earth, it is a fairly common element. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. The chemical symbol for Silver is Ag. The element is obtained from chlorides by electrolysis or via the action of oxidizing agents. Atomic Mass of Chlorine. We use cookies to ensure that we give you the best experience on our website. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. Tin is a post-transition metal in group 14 of the periodic table. The chemical symbol for Bismuth is Bi. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. The chemical symbol for Neodymium is Nd. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. The chemical symbol for Silicon is Si. The chemical symbol for Indium is In. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Element of atomic number 17 7 Little Words . Carbon is one of the few elements known since antiquity. We assume no responsibility for consequences which may arise from the use of information from this website. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. Iron is a metal in the first transition series. Under standard conditions, it is the lightest metal and the lightest solid element. Too little chloride produces hypochloremia. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. The chemical symbol for Cadmium is Cd. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Chlorine definition, a halogen element, a heavy, greenish-yellow, incombustible, water-soluble, poisonous gas that is highly irritating to the respiratory organs, obtained chiefly by electrolysis of sodium chloride brine: used for water purification, in the making of bleaching powder, and in the manufacture both of chemicals that do not contain chlorine, as ethylene glycol, and of those that do. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. This is a list of the 118 chemical elements which have been identified as of 2020. The atomic mass is the mass of an atom. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). overall. It occurs on Earth as the decay product of various heavier elements. The element is used to manufacture chlorates, carbon tetrachloride, chloroform, and in the extraction of bromine. The chemical symbol for Chromium is Cr. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. The chemical symbol for Rubidium is Rb. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Tungsten is an intrinsically brittle and hard material, making it difficult to work. It is a soft, silvery-white alkali metal. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Atomic mass of Chlorine is 35.453 u.. The chemical symbol for Samarium is Sm. Synonyms for atomic number 17 in Free Thesaurus. Since you already solved the clue Element of atomic number 17 which had the answer CHLORINE, you can simply go back at the main post to check the other daily crossword clues. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. The chemical symbol for Manganese is Mn. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. The chemical symbol for Dysprosium is Dy. Berkelium is a member of the actinide and transuranium element series. The chemical symbol for Neon is Ne. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. The chemical symbol for Californium is Cf. What is the formula for a mass number of an atom? Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. The chemical symbol for Berkelium is Bk. Periodic Table of Elements - The periodic table is a very useful listing of all 118 elements by symbol, atomic number, and atomic mass and molecular mass. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. The bulk properties of astatine are not known with any certainty. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Like … The atomic number of ‘X’ is 17. In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. Europium is one of the least abundant elements in the universe. Tellurium is chemically related to selenium and sulfur. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. and Gay-Lussac, L.-J. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. Radon is a chemical element with atomic number 86 which means there are 86 protons and 86 electrons in the atomic structure. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure.The chemical symbol for Oxygen is O. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. 1) You may use almost everything for non-commercial and educational use. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2020 Periodic Table | All Rights Reserved |. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Often, the resulting number contains a decimal. Neptunium metal is silvery and tarnishes when exposed to air. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. The gas acts as an irritant for respiratory and other mucous membranes. It has the atomic number 17 in the periodic table and belongs in Group 17, the Halogens. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. The chemical symbol for Selenium is Se. Krypton is a member of group 18 (noble gases) elements. greenish-yellow gas. The chemical symbol for Bromine is Br. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. The chemical symbol for Oxygen is O. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Appearance: greenish-yellow, irritating gas. The chemical symbol for Lutetium is Lu. Visit BYJUS to learn more about it. Isotopes: 16 known isotopes with atomic masses ranging from 31 to 46 amu. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. The chemical symbol for Lanthanum is La. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. Neodymium is a soft silvery metal that tarnishes in air. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. 17. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Atomic Number: 17 Atomic Mass: 35.4527 amu Melting Point:-100.98 °C (172.17 K, -149.764 °F) Boiling Point:-34.6 °C (238.55 K, -30.279997 °F) Number of Protons/Electrons: 17 Number of Neutrons: 18 Classification: Halogen Crystal Structure: Orthorhombic Density @ 293 K: 3.214 g/cm 3 Color: green Atomic Structure It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. This is a list of chemical elements, sorted by atomic mass (or most stable isotope) and color coded according to type of element.Each element's atomic number, name, element symbol, and group and period numbers on the periodic table are given. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Elements with similar chemical properties are called groups. By mass, aluminium makes up about 8% of the Earth’s crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Usually, hyperchloremia is asymptomatic, but it can present much like hypernatremia (too much sodium). Like other halogens, it is an extremely reactive element and strong oxidizer. The chemical symbol for Barium is Ba. The information contained in this website is for general information purposes only. The chemical symbol for Molybdenum is Mo. Hypochloremia may be caused by hypoventilaton or chronic respiratory acidosis. Chlorine figures prominently in many organic chemistry reactions, particularly in substitutions with hydrogen. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. Thorium is moderately hard, malleable, and has a high melting point. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. greenish-yellow gas. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Chlorine 37 contains 17 protons, 17 electrons and 20 neutrons. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. It is used for disinfecting drinking water. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Chlorine gas is a greenish yellow. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. The chemical symbol for Zinc is Zn. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Calculate atomic number, atomic mass, and charge by using mathematical expressions (4-6): Z = 16 Antonyms for atomic number 17. The atomic mass is the mass of an atom. Atomic Number 17. The chemical symbol for Curium is Cm. © 2019 / see also Holmium is a part of the lanthanide series, holmium is a rare-earth element. Chlorine is a chemical element with atomic number 17 and element symbol Cl. She has taught science courses at the high school, college, and graduate levels. We've found 168 lyrics, 31 artists, and 48 albums matching atomic number 17.. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. The chemical symbol for Americium is Am. The chemical symbol for Mercury is Hg. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. The chemical symbol for Krypton is Kr. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. In nuclear reactors, promethium equilibrium exists in power operation. The chemical symbol for Cerium is Ce. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Pure radium is silvery-white alkaline earth metal. The chemical symbol for Palladium is Pd. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. The chemical symbol for Lithium is Li. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. The chemical symbol for Nobelium is No. Uses: Chlorine is used in many everyday products. The chemical symbol for Rhenium is Re. • ATOMIC NUMBER 17 (noun) The noun ATOMIC NUMBER 17 has 1 sense:. Name: Chlorine: Symbol: Cl Atomic Number: 17: Atomic Mass: 35.453 atomic mass units: Number of Protons: 17: Number of Neutrons: 18: Number of Electrons: 17: Melting Point Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. The ordering of the electrons in the ground state of multielectron atoms, starts with the lowest energy state (ground state) and moves progressively from there up the energy scale until each of the atom’s electrons has been assigned a unique set of quantum numbers. The chemical symbol for Radon is Rn. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Atomic mass of Oxygen is 15.9994 u.. Zirconium is widely used as a cladding for nuclear reactor fuels. ThoughtCo uses cookies to provide you with a great user experience. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. In order to write the Chlorine electron configuration we first need to know the number of electrons for the Cl atom (there are 17 electrons). In a neutral atom there are as many electrons as protons moving about nucleus. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. The chemical symbol for Xenon is Xe. It is the second lightest halogen, after fluorine. Lead is soft and malleable, and has a relatively low melting point. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. A … Its extreme rarity in the Earth’s crust, comparable to that of platinum. Sources: In nature, chlorine is only found in the combined state, most commonly with sodium as NaCl and in carnallite (KMgCl3•6H2O) and sylvite (KCl). Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. The chemical symbol for Gold is Au. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Properties: Chlorine has a melting point of -100.98°C, boiling point of -34.6°C, density of 3.214 g/l, specific gravity of 1.56 (-33.6°C), with a valence of 1, 3, 5, or 7. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Match the atomic number 4, 8, 14, 15 and 19 with each of the following: (a) A solid non-metal of valelncy 3. asked Sep 6, 2018 in Chemistry by PriyaBharti ( 53.7k points) chemical bonding The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons . Platinum is one of the least reactive metals. A toxic chemical element with the atomic number 17 Some of those Crosswords are really hard to solve, that’s why we have build our website, only to help you our with the answers. In humans, the ion is obtained mainly from salt (sodium chloride).