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Protactinium
ProtactiniumDownload Chemistry-applikationen for at se flere oplysninger om det kemiske element:
| Atomnummer | 91 |
| Gruppe | VB |
| Periode | 7 |
| Vægt | 231.03587 |
| Latinsk navn | Protactinium |
| Elektronkonfiguration | [Rn]5f2 6d7s2 |
| Oxidationstilstand | 0, 2, 3, 4, 5 |