Boron: Properties


Atomic

  • Atomic Mass: 10.81
  • Electronegativity:
    • Pauling: 2.04
    • Allred: 2.01
    • Absolute: 4.29 eV
  • Electron Affinity: 26.7 kJ mol-1
  • Polarizability: 3 3
  • Effective Nuclear Charge:
    • Slater: 2.6
    • Clementi: 2.42
    • Froese Fischer: 2.27
  • Radius:
    • B 3 +: 23 pm
    • Atomic: 83 pm
    • Covalent: 88 pm
    • Van der Waals: 208 pm
  • Atomic Ionization Energies:
    • 2p : 801 kJ mol-1
    • 2s : 1248 kJ mol-1
    • 1s : 18525 kJ mol-1
  • Successive Ionization Energies:
    • B - B + : 800.6 kJ mol-1
    • B+1 - B+2 : 2427 kJ mol-1
    • B+2 - B+3 : 3660 kJ mol-1
    • B+3 - B+4 : 25025 kJ mol-1
    • B+4 - B+5 : 32822 kJ mol-1
  • Common Ions : B 3 +