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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 >> show long |
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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