Nickel
Elemental State Ni
Electron Configuration 1s22s22p63s23p64s23d8
First Ionization Potential 7.640 eV
Electron Affinity 1.156 eV
Z* 5.711 (Clementi-Raimondi)
Pauling Electronegativity 1.91
Covalent Radius 1.20 Å
Metallic Radius 1.25 Å
Ionic Radius 0.69 Å Ni2+ coordination number = 4

0.63 Å Ni2+ coordination number = 4, square planar

0.77 Å Ni2+ coordination number = 5

0.830 Å Ni2+ coordination number = 6

0.70 Å Ni3+ coordination number = 6; low spin

0.74 Å Ni3+ coordination number = 6; high spin

0.62 Å Ni4+ coordination number = 6; low spin

van der Waal's Radius 1.63 Å
Melting Point 1455 oC
Boiling Point 2913 oC
Density 8.902 g/cm3
Other Properties