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 |
| |
| name |
Arsenic |
| latin |
Arsenicum |
| french |
Arsenic |
| german |
Arsen |
| symbol |
As |
| proton number |
33 |
| atomic weight |
74.9216 |
| Pauling electronegativity |
2.18 |
| electronic configuration |
[Ar] 3d104s24p3
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| melting point |
1090 K, 817°C, 1502°F |
| boiling point |
887 K, 614°C, 1137°F |
| group |
15 |
| period |
4 |
| state (by 20°C) |
solid |
| oxidation states |
-3, +3, +5 |
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Discoverer
| Year of discovery |
Discoverer |
| 1250 |
Albertus Magnus (1200-1280) |
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Czech version