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Uranium

Chemical element
Uranium is a chemical element; it has symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactively... Wikipedia
Symbol: U
Atomic number: 92
Atomic mass: 238.02891 u
Discovered: 1789
Electron configuration: [Rn] 5f³ 6d¹ 7s²
Melting point: 2,070°F (1,132°C)