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Neptunium

Np

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  • Neptune Figurine: Neptune was the Roman god of the sea, for which the element is named after

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Symbol: Np

Atomic Number:Ìý93

Atomic Mass: 237 u

Electron Configuration: [Rn] 5f46d17s2

Year Discovered: 1940

Discovered By: Edwin McMillan and Philip Abelson