Post-transition metal

Aluminum

Aluminum (Al) has atomic number 13. PubChem classifies it as post-transition metal.

Atomic number

13

Symbol

Al

Atomic weight (source value)

26.981538

Electron configuration

[Ne]3s2 3p1

Standard state

Solid

Electronegativity (Pauling)

1.61

Melting point (K)

933.437

Boiling point (K)

2792

Density (g/cm³)

2.70

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.