Uranium is a silvery-white metallic chemical element in the periodic table, with atomic number 92. It is assigned the chemical symbol U. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium has the highest atomic weight of all naturally occurring elements.

Uranium is used to power commercial nuclear reactors that produce electricity, produce isotopes used for medical, industrial, and defense purposes around the world, and is used to create atomic bombs.