Pure germanium is a semiconductor with an appearance similar to elemental silicon. Uranium has the highest atomic weight of the primordially occurring elements. The chemical symbol for Silicon is Si. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. Boron is found in borates, borax, boric acid, colemanite, kernite, and ulexite.The name Boron originates from a combination of carbon and the Arabic word buraqu meaning borax. All of its isotopes are radioactive. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. In general, boiling is a phase change of a substance from the liquid to the gas phase. It occurs on Earth as the decay product of various heavier elements. Borane, any of a homologous series of inorganic compounds of boron and hydrogen or their derivatives. The chemical symbol for Ruthenium is Ru. The chemical symbol for Neon is Ne. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. −181 °C), their melting points differing by 284 °C. The chemical symbol for Bismuth is Bi. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. 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. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. The chemical symbol for Zinc is Zn. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The chemical symbol for Silver is Ag. Carbon is one of the few elements known since antiquity. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The chemical symbol for Europium is Eu. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 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. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. USA; Globally; ... Borane-d 3-THF complex solution. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. 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). 14034-78-7. hydroperoxy(oxo)borane. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Lawrencium is the final member of the actinide series. 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. The B-N distance is 1.58(2) Å. Iron is a metal in the first transition series. The chemical symbol for Zirconium is Zr. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. 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