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26
Fe
55.845
Iron
Transition metals · Group 8 · Period 4
Atomic properties
| Atomic number | 26 |
|---|---|
| Symbol | Fe |
| Standard atomic weight | 55.845 |
| Classification | Transition metals |
| Group | 8 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 3d6 4s2 |
| Electronegativity (Pauling) | 1.83 |
| Common oxidation states | +3, +2 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 7.874 g/cm³ |
| Melting point | 1538 °C |
| Boiling point | 2861 °C |
| Discovered | Ancient |
| CAS number | — |