Atomic Element Z = 28 • Transition Metal
Nickel (Ni) — Atomic Data, Electron Shells & Reactions
Nickel (symbol Ni, atomic number 28) has a standard atomic weight of 58.693 u and ground-state configuration [Ar] 3d8 4s2.
Atomic Number (Z)
28
IUPAC Symbol
Ni
Standard Atomic Weight
58.693 g/mol
Period / Group / Block
4 / 10 / d-block
Condensed Electron Config
[Ar] 3d8 4s2
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d8 4s2
Principal Shell Occupancy
[2, 8, 16, 2]
Pauling Electronegativity
1.91
First Ionization Energy
737 kJ/mol
Covalent Radius
124 pm
Melting Point
1728 K (1454.85 °C)
Boiling Point
3186 K (2912.85 °C)
Density
8.912 g/cm³
Oxidation States
+2, +3
Ni (Z=28) — Valence shell highlighted in vermilion