Uranium (U) — Atomic Data, Electron Shells & Reactions

Atomic Number (Z) 92 IUPAC Symbol U Standard Atomic Weight 238.03 g/mol Period / Group / Block 7 / f-block / f-block Condensed Electron Config [Rn] 5f3 6d1 7s2 Full Subshell Config 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f3 6s2 6p6 6d1 7s2 Principal Shell Occupancy [2, 8, 18, 32, 21, 9, 2] Pauling Electronegativity 1.38 First Ionization Energy 598 kJ/mol Covalent Radius 196 pm Melting Point 1405.3 K (1132.15 °C) Boiling Point 4404 K (4130.85 °C) Density 18.95 g/cm³ Oxidation States +6, +4