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Promethium
PromethiumDownload Chemistry-applikationen for at se flere oplysninger om det kemiske element:
| Atomnummer | 61 |
| Gruppe | VIIB |
| Periode | 6 |
| Vægt | 145 |
| Latinsk navn | Promethium |
| Elektronkonfiguration | [Xe]4f5 6s2 |
| Oxidationstilstand | 0, 2, 3 |