| Property | Value |
|---|---|
| Atomic number | 26 |
| Atomic weight | 55.8452 amu |
| Element family | Transition metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 54Fe: 5.8%, 56Fe: 91.7%, 57Fe: 2.2%, 58Fe: 0.3% |
| Previous element | Manganese |
| Next element | Cobalt |
| Density | 7.874 g/cm3 (STP) |
| Melting | 1535 °C |
| Boiling | 2750 °C |
| Covalent radius | 1.16 Å |
| Ionic radius | 0.645 Å |
| Metallic radius | 1.26 Å |
| First ionization potential | 7.903 eV |
| Electron affinity | 0.153 eV |
| Electronegativity | 1.83 |
| Discovery year | 5000 BC |
Iron is an element number 26 from transition metals family. Its symbol is Fe. Iron atomic weight is 55.8452 amu. Fe stable and long lived isotopes are 54Fe: 5.8%, 56Fe: 91.7%, 57Fe: 2.2%, 58Fe: 0.3%. Iron electronic configuration is 1s22s22p63s23p64s23d6. Sample compounds that contain Iron are Fe2O3, FeCl3, FeSO4, FeCl2, Fe(NO3)3, FeO.
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