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
Frequently asked questions
What is Indium?
Indium (In) is a post-transition metal, element number 49 on the periodic table. Used in LCD touchscreens.
What is the atomic number and atomic mass of Indium?
Indium has atomic number 49 and an atomic mass of about 114.82 g/mol.
What is the electron configuration of Indium?
The electron configuration of Indium is [Kr] 4d¹⁰ 5s² 5p¹.
Where is Indium on the periodic table?
Indium sits in group 13, period 5, and is classified as a post-transition metal.