What element has the symbol 'U'?

The story behind the answer

The chemical symbol U stands for Uranium, element 92—a very heavy, silvery metal known for its radioactivity. It’s the fuel behind many nuclear reactors (think U-235 and U-238). Uranium was identified in 1789 by Martin Heinrich Klaproth and named after the planet Uranus, discovered just a few years earlier.

The distractors aren’t elements: Ununpentium is the former placeholder name for element 115 (now Moscovium, Mc), Uranate refers to uranium-containing ions or salts, and “Urbium” isn’t