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| name |
Neptunium |
| latin |
Neptunium |
| french |
Neptunium |
| german |
Neptunium |
| symbol |
Np |
| proton number |
93 |
| atomic weight |
237.0482 |
| Pauling electronegativity |
1.36 |
| electronic configuration |
[Rn] 5f46d17s2
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| melting point |
910 K, 637°C, 1178°F |
| boiling point |
4273 K, 4000°C, 7232°F |
| group |
- |
| period |
7 |
| state (by 20°C) |
solid |
| oxidation states |
+3, +4, +5, +6 |
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Discoverer
| Year of discovery |
Discoverers |
| 1940 |
Edwin M. McMillan (1907-1991)
P. H. Abelson |
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Czech version