Uranium (U), element 92 – Learn Acer periodic table

Uranium

Actinide, atomic number 92.

Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.

Facts

Symbol U. Atomic mass 238.028913 u. Group 3, period 7. Electron configuration [Rn] 5f3 6d1 7s2. Electrons per shell 2, 8, 18, 32, 21, 9, 2. State at room temperature: Solid. Melting point 1132.2 °C, boiling point 4130.9 °C. Discovered by Martin Heinrich Klaproth.

Element data from Wikipedia, CC BY-SA 3.0.