28
Ni
nickel
58.693

General properties

Group
group 10
Period
period 4
Category
transition metals
Standard atomic weight
58.6934(4)
Melting point
1728 K (1455 °C)
Boiling point
3003 K (2730 °C)
Phase at STP
solid

Additional properties

Block
d-block
Electron configuration
[Ar] 3d⁸ 4s² [Ar] 3d⁹ 4s¹
Electrons per shell
2, 8, 16, 2
Electronegativity
1.91
Density
8.908 g/cm³
Oxidation states
−2, −1, 0, +1, +2, +3, +4
CAS Number
7440-02-0