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| In | Indium | Metal |
| Atomic number: | 49 | Atomic weight: | 114.818 | ||
| Shells: | 2,8,18,18,3 | Orbitals: | [Kr] 4d10 5s2 5p1 | ||
| Melting point: | 156.61°C | Boiling point: | 2080°C | ||
| Covalent radius: | 1.44 | Å | Atomic volume: | 15.7 | cm³/mol |
| Atomic radius: | 2.00 | Å | Ionic radius: | .80 (+3) | Å |
| Electronegativity: | 1.78 | Oxidation states: | |||
| 1st ionization pot.: | 5.7864 | V | 2nd ionization pot.: | 18.869 | V |
| 3rd ionization pot.: | 28.03 | V | Specific heat: | 0.23 | J/gK |
| Heat of fusion: | 3.263 | kJ/mol | Heat of vapor.: | 231.50 | kJ/mol |
| Thermal conduct.: | 0.816 | W/cmK | Electrical conduct.: | 0.116 | 10^6/cm ohm |
| Density: | 7.31 | g/cm³ | Valence: | 1,2,3 |
