Platinum: Properties


Atomic

  • Atomic Mass: 195.08
  • Electronegativity:
    • Pauling: 2.28
    • Allred: 1.44
    • Absolute: 5.6 eV
  • Electron Affinity: 205.3 kJ mol-1
  • Polarizability: 6.5 3
  • Effective Nuclear Charge:
    • Slater: 4.05
    • Clementi: 10.75
    • Froese Fischer: 15.65
  • Radius:
    • Pt 2 +: 85 pm
    • Pt 4 +: 70 pm
    • Atomic: 138 pm
    • Covalent: 129 pm
  • Successive Ionization Energies:
    • Pt - Pt + : 870 kJ mol-1
    • Pt+1 - Pt+2 : 1791 kJ mol-1
    • Pt+2 - Pt+3 : (2800) kJ mol-1
    • Pt+3 - Pt+4 : (3900) kJ mol-1
    • Pt+4 - Pt+5 : (5300) kJ mol-1
    • Pt+5 - Pt+6 : (7200) kJ mol-1
    • Pt+6 - Pt+7 : (8900) kJ mol-1
    • Pt+7 - Pt+8 : (10500) kJ mol-1
    • Pt+8 - Pt+9 : (12300) kJ mol-1
    • Pt+9 - Pt+10 : (14100) kJ mol-1
  • Common Ions : Pt 2 +, Pt 4 +