Element record / Post-transition metal
Indium
Metal- Atomic number
- 49
- Atomic mass (u)
- 114.818
- Category
- Post-transition metal
- Standard state
- Solid
- Melting point
- 156.6 °C (429.75 K)
- Boiling point
- 2071.85 °C (2345 K)
- Density (g/cm³)
- 7.31
- Electronegativity (Pauling)
- 1.78
- Electron configuration
- [Kr]5s2 4d10 5p1
- Oxidation states
- +3
- Atomic radius (pm)
- 193
- First ionization energy (eV)
- 5.786
Discovery & recognition
- Discovery year / period (PubChem)
- 1863
- Discovery credited to (RSC)
- Ferdinand Reich and Hieronymous Richter
- Date or period recorded by RSC
- 1863
- Discovery place
- Freiberg, Germany
An ancient date does not identify a first human discovery. Different references may date observation, isolation and formal recognition differently.
Natural occurrence & production
The creation of an element’s nuclei and its concentration into terrestrial deposits are different processes. The occurrence note below concerns its presence or production on Earth; it is not a complete account of nucleosynthesis.
“Indium is one of the least abundant minerals on Earth.”
Royal Society of Chemistry · occurrence excerpt ↗
Continue the research
PubChem · properties and references ↗
Royal Society of Chemistry · occurrence, uses and discovery history ↗
Reference values are not product specifications. Blank values have not been estimated. For superheavy elements, some properties and family assignments are theoretical or incompletely measured.