Francium is a highly radioactive metal that decays into astatine, radium, and radon. The information contained in this website is for general information purposes only. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 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. The chemical symbol for Zirconium is Zr. Caesium has physical and chemical properties similar to those of rubidium and potassium. Uranium has the highest atomic weight of the primordially occurring elements. 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 |. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. 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. 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. 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. Although neodymium is classed as a rare earth, it is a fairly common element. Holmium is a relatively soft and malleable silvery-white metal. Nobelium Overview Nobelium Complete Electron Configuration 1s2 2s2 2p6 3s2 3p6 4 s2 3 d10 4 p6 5 s2 4 d10 5 p6 6 s2 5 d10 4 f14 6 p6 7 s2 5 f14 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. Period 6, group 1. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). It is fairly soft and slowly tarnishes in air. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. While there are more protons in a cesium atom, there are also many more electrons shielding the outer electron from the nucleus. Fermium is a member of the actinide series. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. and the term oxidation number is nearly synonymous. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. This means the element for which it is easiest to remove an electron and form a cation, is in the bottom left-hand corner of the periodic table, where caesium is found. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. The chemical symbol for Oxygen is O. It is a soft, silvery-white alkali metal. 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 Neon is Ne. A representation of the atomic spectrum of caesium. The chemical symbol for Chromium is Cr. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium.


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