Transition metal

Nickel

Nickel (Ni) has atomic number 28. PubChem classifies it as transition metal.

Atomic number

28

Symbol

Ni

Atomic weight (source value)

58.693

Electron configuration

[Ar]4s2 3d8

Standard state

Solid

Electronegativity (Pauling)

1.91

Melting point (K)

1728

Boiling point (K)

3186

Density (g/cm³)

8.912

Oxidation states

+3, +2

Understanding this entry

Atomic number is the number of protons in the nucleus. Properties are reference values and may depend on conditions and measurement conventions. An atomic weight is not the mass of every isotope. For elements without a standard atomic weight, a source may report an isotope mass number. Blank source values are shown as unavailable rather than estimated.

Further reading and reference: NIH PubChem source dataset ↗. Values and educational summaries are not a substitute for specialised advice.