Fermium: Properties


Atomic

  • Atomic Mass: (257)
  • Electronegativity:
    • Pauling: 1.3
  • Polarizability: 23.8 3
  • Effective Nuclear Charge:
    • Slater: 1.65
  • Radius:
    • Fm 2 +: 115 pm
    • Fm 3 +: 97 pm
    • Fm 4 +: 84 pm
  • Successive Ionization Energies:
    • Fm - Fm + : 627 kJ mol-1
  • Common Ions : Fm 2 +, Fm 3 +, Fm 4 +