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Selen
SelenDownload Chemistry-applikationen for at se flere oplysninger om det kemiske element:
| Atomnummer | 34 |
| Gruppe | VIA |
| Periode | 4 |
| Vægt | 78.96 |
| Latinsk navn | Selenium |
| Elektronkonfiguration | [Ar]3d10 4s2 4p4 |
| Oxidationstilstand | -2, -1, 0, 1, 2, 3, 4, 5, 6 |