Indium (In)
Indium is the chemical element with atomic number 49 and symbol In. It is a métal pauvre in period 5, group 13, with a standard atomic weight of 114.82 u.
Faits essentiels
- Z
- 49
- Atomic weight
- 114.82 u
- Category
- métal pauvre
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1863
- CAS
- 7440-74-6
Propriétés mesurées
| Property | Value | Source |
|---|---|---|
| Electronegativity | 1.78 | National Center for Biotechnology Information (NIH) |
| Melting point | 429.75 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 2,345 K | National Center for Biotechnology Information (NIH) |
| Density stp | 7.31 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 193 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 558.3 kJ/mol | National Center for Biotechnology Information (NIH) |
| Electron affinity | 28.9 kJ/mol | National Center for Biotechnology Information (NIH) |
Configuration électronique
- Noble gas notation
- [Kr] 4d¹⁰ 5s² 5p¹
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p¹
- Electrons per shell
- 2, 8, 18, 18, 3