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 |
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| name |
Selenium |
| latin |
Selenium |
| french |
Sélénium |
| german |
Selen |
| symbol |
Se |
| proton number |
34 |
| atomic weight |
78.96 |
| Pauling electronegativity |
2.55 |
| electronic configuration |
[Ar] 3d104s24p4
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| melting point |
494 K, 221°C, 430°F |
| boiling point |
958 K, 685°C, 1265°F |
| group |
16 |
| period |
4 |
| state (by 20°C) |
solid |
| oxidation states |
-2, +4, +6 |
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Discoverer
| Year of discovery |
Discoverer |
| 1817 |
Jons J. Berzelius (1779-1848) |
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Czech version