Osmium: Properties


Atomic

  • Atomic Mass: 190.2
  • Electronegativity:
    • Pauling: 2.2
    • Allred: 1.52
    • Absolute: 4.9 eV
  • Electron Affinity: 106 kJ mol-1
  • Polarizability: 8.5 3
  • Effective Nuclear Charge:
    • Slater: 3.75
    • Clementi: 10.32
    • Froese Fischer: 14.9
  • Radius:
    • Os 3 +: 62 pm
    • Os 1 +: 113 pm
    • Atomic: 122.1 pm
    • Covalent: 125 pm
  • Successive Ionization Energies:
    • Os - Os + : 840 kJ mol-1
    • Os+1 - Os+2 : (1600) kJ mol-1
    • Os+2 - Os+3 : (2400) kJ mol-1
    • Os+3 - Os+4 : (3900) kJ mol-1
    • Os+4 - Os+5 : (5200) kJ mol-1
    • Os+5 - Os+6 : (6600) kJ mol-1
    • Os+6 - Os+7 : (8100) kJ mol-1
    • Os+7 - Os+8 : (9500) kJ mol-1
  • Common Ions : Os 3 +, Os 1 +