Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. 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 Chlorine is Cl. 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. 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 Lithium is Li. The chemical symbol for Nickel is Ni. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. 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. 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. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. The chemical symbol for Silver is Ag. The difference is a measure of the nuclear binding energy which holds the nucleus together. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. It is a noble metal and a member of the platinum group. 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. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. The chemical symbol for Palladium is Pd. Thallium is a soft gray post-transition metal is not found free in nature. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. The chemical symbol for Helium is He. 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. In the periodic table, potassium is one of the alkali metals. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 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. The chemical symbol for Uranium is U.  The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. Radon is a radioactive, colorless, odorless, tasteless noble gas. Iron is a metal in the first transition series. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. 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. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. 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. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Thulium is the thirteenth and third-last element in the lanthanide series. The chemical symbol for Radon is Rn. Uranium is a silvery-white metal in the actinide series of the periodic table. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 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. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. The chemical symbol for Tellurium is Te. The chemical symbol for Einsteinium is Es. 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. Mass numbers of typical isotopes of Lead are 204-208. The chemical symbol for Zinc is Zn. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. Elemental sulfur is a bright yellow crystalline solid at room temperature. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. 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. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Pure radium is silvery-white alkaline earth metal. The chemical symbol for Uranium is U. 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. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. The chemical symbol for Rhenium is Re. The Cookies Statement is part of our Privacy Policy. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. 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. If you continue to use this site we will assume that you are happy with it. The chemical symbol for Polonium is Po. The chemical symbol for Bromine is Br. The chemical symbol for Antimony is Sb. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure.

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