Chemical Elements History and Information Neptunium
About the chemical element Neptunium, its symbol, atomic number and weight, who discovered it and when.
The Atomic Elements and Their Uses
(Element) (Symbol) (Atomic number) (Atomic weight)
Neptunium Np 93 237.0482
Discovered by Edwin McMillan and Philip Abelson of the U.S. in 1940. Neptunium was the first artificially produced element.
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