On This Day In Chemistry

June 8th

The discovery of element 93, neptunium, was announced on this day in 1940

Neptunium (Np) was synthesised by Edwin McMillan and Philip H. Abelson, who bombarded uranium (U) with neutrons to cause nuclear fission. Neptunium is rare in nature and is only made artificially from spent uranium rods in nuclear reactors.

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