Cerium (Ce) — Atomic Data, Electron Shells & Reactions

Atomic Number (Z) 58 IUPAC Symbol Ce Standard Atomic Weight 140.12 g/mol Period / Group / Block 6 / f-block / f-block Condensed Electron Config [Xe] 4f1 5d1 6s2 Full Subshell Config 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f1 5s2 5p6 5d1 6s2 Principal Shell Occupancy [2, 8, 18, 19, 9, 2] Pauling Electronegativity 1.12 First Ionization Energy 534 kJ/mol Covalent Radius 204 pm Melting Point 1068 K (794.85 °C) Boiling Point 3716 K (3442.85 °C) Density 6.77 g/cm³ Oxidation States +4, +3