Post-transition metal

Gallium

Gallium (Ga) has atomic number 31. PubChem classifies it as post-transition metal.

Atomic number

31

Symbol

Ga

Atomic weight (source value)

69.723

Electron configuration

[Ar]4s2 3d10 4p1

Standard state

Solid

Electronegativity (Pauling)

1.81

Melting point (K)

302.91

Boiling point (K)

2477

Density (g/cm³)

5.91

Oxidation states

+3

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.