| Fe | Iron | Transition Metal |
| Atomic number: | 26 | Atomic weight: | 55.847 | ||
| Shells: | 2,8,14,2 | Orbitals: | [Ar] 3d6 4s2 | ||
| Melting point: | 1535°C | Boiling point: | 2861°C | ||
| Covalent radius: | 1.17 | Å | Atomic volume: | 7.1 | cm³/mol |
| Atomic radius: | 1.72 | Å | Ionic radius: | .55 (+3) | Å |
| Electronegativity: | 1.83 | Oxidation states: | 2,(3) | ||
| 1st ionization pot.: | 7.9024 | V | 2nd ionization pot.: | 16.18 | V |
| 3rd ionization pot.: | 30.651 | V | Specific heat: | 0.44 | J/gK |
| Heat of fusion: | 13.80 | kJ/mol | Heat of vapor.: | 349.60 | kJ/mol |
| Thermal conduct.: | 0.802 | W/cmK | Electrical conduct.: | 0.0993 | 10^6/cm ohm |
| Density: | 7.86 | g/cm³ | Valence: | 2,3,4,6 |