Indium |
| Symbol | In |
|---|---|
| Latin name | Indium |
| Atomic number | 49 |
| Period | 5 |
| Element category | Metals |
| Relative atomic mass | 114.82 |
| Group | III.A |
| Electronegativity | 1.7 |
| Oxidation numbers | 1, 3 |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p1 |
| Density [g/cm3] | 7.31 |
| State | Solid |
| Melting point [°C] | 156.63 |
| Boiling point [°C] | 2080 |
| Atomic radius [pm] | 156 |
| Covalent radius [pm] | 144 |
| Thermal conductivity [W m-1K-1] | 81.6 |
| Heat capacity [J K-1g-1] | 0.233 |
| Discovery | 1863 |
| Hardness [Mohs scale] | 1.2 |
| Young's modulus [GPa] | 11 |
| Electrical conductivity [S m-1] | 3.4 · 106 |
| 1.st ionization energy [eV] | 5.7864 |
| 2.nd ionization energy [eV] | 18.869 |
| 3.rd ionization energy [eV] | 28.03 |
| Stable isotopes | 2 |
| Unstable isotopes | 32 |