Californium (Cf) — Atomic Data, Electron Shells & Reactions

Atomic Number (Z) 98 IUPAC Symbol Cf Standard Atomic Weight 251 g/mol Period / Group / Block 7 / f-block / f-block Condensed Electron Config [Rn] 5f10 7s2 Full Subshell Config 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f10 6s2 6p6 7s2 Principal Shell Occupancy [2, 8, 18, 32, 28, 8, 2] Pauling Electronegativity 1.3 First Ionization Energy 608 kJ/mol Covalent Radius 168 pm Melting Point 1173 K (899.85 °C) Boiling Point 1743 K (1469.85 °C) Density 15.1 g/cm³ Oxidation States +3