Arsenic is a metalloid. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. The information contained in this website is for general information purposes only. Plutonium can form alloys and intermediate compounds with most other metals. Isotopes of the same element have the same number of protons in their nuclei but differ by the number of neutrons. The chemical symbol for Cerium is Ce. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Regarding its position within the periodic table of elements, it can be found in period 7. 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. Gold is a transition metal and a group 11 element. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Name: Plutonium Symbol: Pu Atomic Number: 94 Atomic Mass: (244.0) amu Melting Point: 639.5 °C (912.65 K, 1183.1 °F) Boiling Point: 3235.0 °C (3508.15 K, 5855.0 °F) Number of Protons/Electrons: 94 Number of Neutrons: 150 Classification: Rare Earth Crystal Structure: Monoclinic Density @ 293 K: 19.84 g/cm 3 Color: Unknown Atomic Structure 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. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). The chemical symbol for Indium is In. The chemical symbol for Bromine is Br. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. 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. Among the plutonium isotopes, Pu-239 is the fissile isotope. The chemical symbol for Thulium is Tm. ... Melting point = 912.5 K, 639.4 °C, 1182.9 °F Boiling point = 3505 K, 3228 °C, 5842 °F The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. 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. It is one of the least reactive chemical elements and is solid under standard conditions. unknown. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Boiling Point: 3505 K Malleability: Plutonium works a bit differently than other elements in the fact that it can be as brittle as glass and as malleable as aluminum. 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