49 In
Post-transition metal
Indium
Used in LCD touchscreens.
Properties of Indium
- Atomic number (Z)
- 49
- Symbol
- In
- Atomic mass
- 114.82 g/mol
- Category
- Post-transition metal
- Group
- 13
- Period
- 5
- Electron configuration
- [Kr] 4d¹⁰ 5s² 5p¹
- Electronegativity (Pauling)
- 1.78
- Atomic radius
- 156 pm
- First ionization energy
- 558 kJ/mol
- Melting point
- 429.75 K (156.6 °C)
- Boiling point
- 2345 K (2071.8 °C)
- Density
- 7.31 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1863