| Element | Iron | Symbol | Fe |
| Atomic Number | 26 | Molar Mass | 55.85 gmol-1 |
| Electron Configuration | [Ar]3d64s2 | Normal State | solid metal |
| Density @STP | 7.87 g cm-3 | Melting Point | 1538oC |
| Boiling Point | 2861oC | Stable Isotopes | 54Fe, 56Fe, 57Fe, 58Fe |
| Atomic Radius | 124 pm | Ionic Radius | 82 (2+) pm |
| Electronegativity (Pauling) | 1.83 | Ionization Energy (1st) | 759 kJ mol-1 |
| Ionization Energy (2nd) | 1561 kJ mol-1 | Ionization Energy (3rd) | 2957 kJ mol-1 |
| Molar Heat Capacity | 25.1 J K-1mol-1 | Standard Molar Entropy | 27.3 J K-1mol-1 |
| Enthalpy of Fusion | 14.9 kJ mol-1 | Enthalpy of Vapourization | 351 kJ mol-1 |