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Jern
JernDownload Chemistry-applikationen for at se flere oplysninger om det kemiske element:
| Atomnummer | 26 |
| Gruppe | VIIIB |
| Periode | 4 |
| Vægt | 55.845 |
| Latinsk navn | Ferrum |
| Elektronkonfiguration | [Ar]3d6 4s2 |
| Oxidationstilstand | -4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7 |