All of its isotopes are radioactive. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. M1 944. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. ... 2.2 Electron Configuration. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. [Xe] 6s2 for barium). 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. Tin is a post-transition metal in group 14 of the periodic table. Nickel is a silvery-white lustrous metal with a slight golden tinge. The chemical symbol for Tin is Sn. 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. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 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. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Answer: Find antimony on the periodic table - it is element #51 located in group 15 (p-group) on row 5. Its properties are thus intermediate between those of chlorine and iodine. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. 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. 5p3 and the term symbol is 4S3/2. 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. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. C'est un membre du groupe des pnictogènes. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. and Gay-Lussac, L.-J. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 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. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. 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. 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. Arsenic is a metalloid. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Each entry has a full citation identifying its source. The chemical symbol for Ruthenium is Ru. If you continue to use this site we will assume that you are happy with it. 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. 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 Uranium is U. The chemical symbol for Lead is Pb. 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. Because of its high chemical reactivity, barium is never found in nature as a free element. L'électronégativité selon Pauling est de … Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. The chemical symbol for Gold is Au. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. The chemical symbol for Lutetium is Lu. The chemical symbol for Silicon is Si. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Over 240 facts that span 110 different quantities in his work `` Triumphal Chariot of antimony is Kr! 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