Samarium (Sm) — Atomic Data, Electron Shells & Reactions

Atomic Number (Z) 62 IUPAC Symbol Sm Standard Atomic Weight 150.36 g/mol Period / Group / Block 6 / f-block / f-block Condensed Electron Config [Xe] 4f6 6s2 Full Subshell Config 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f6 5s2 5p6 6s2 Principal Shell Occupancy [2, 8, 18, 24, 8, 2] Pauling Electronegativity 1.17 First Ionization Energy 545 kJ/mol Covalent Radius 198 pm Melting Point 1345 K (1071.85 °C) Boiling Point 2067 K (1793.85 °C) Density 7.52 g/cm³ Oxidation States +3, +2