Post-transition metal

Indium

Indium (In) has atomic number 49. PubChem classifies it as post-transition metal.

Atomic number

49

Symbol

In

Atomic weight (source value)

114.818

Electron configuration

[Kr]5s2 4d10 5p1

Standard state

Solid

Electronegativity (Pauling)

1.78

Melting point (K)

429.75

Boiling point (K)

2345

Density (g/cm³)

7.31

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.