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49
In
114.82
Indium
Post-transition metals · Group 13 · Period 5
Atomic properties
| Atomic number | 49 |
|---|---|
| Symbol | In |
| Standard atomic weight | 114.82 |
| Classification | Post-transition metals |
| Group | 13 |
| Period | 5 |
| Block | p-block |
| Electron configuration | [Kr] 4d10 5s2 5p1 |
| Electronegativity (Pauling) | 1.78 |
| Common oxidation states | +3 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 7.31 g/cm³ |
| Melting point | 156.60 °C |
| Boiling point | 2072 °C |
| Discovered | 1863 |
| CAS number | — |