Nickel

Transition metal · 58.693 u · group 10, period 4

Nickel · Ni

Atomic number28

SymbolNi

CategoryTransition metal

Standard stateSolid

Group · Period · Block10 · 4 · d

Electron configuration[Ar]4s2 3d8

Atomic mass58.693 u

Atomic radius163 pm

Protons / Neutrons / Electrons28 / 31 / 28

Shells (e⁻ per shell)2, 8, 16, 2

Electronegativity (Pauling)1.91

Ionization energy7.64 eV

Electron affinity1.156 eV

Oxidation states+3, +2

Melting point1.73e+3 K · 1.45e+3 °C

Boiling point3.19e+3 K · 2.91e+3 °C

Density8.912 g/cm³

Year discovered1751

CPK color

#50D050

State at room temp (25 °C)

solid

Position

1 in library