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Neptunium
NeptuniumDownload Chemistry-applikationen for at se flere oplysninger om det kemiske element:
| Atomnummer | 93 |
| Gruppe | VIIB |
| Periode | 7 |
| Vægt | 237 |
| Latinsk navn | Neptunium |
| Elektronkonfiguration | [Rn]5f4 6d7s2 |
| Oxidationstilstand | 0, 2, 3, 4, 5, 6, 7 |