The Probert Encyclopaedia of Science & Technology

NEPTUNIUM

Neptunium is a silvery metallic transuranic element synthesized in the production of plutonium and occurring in trace amounts in uranium ores. It was the first element to be made synthetically, being artificially produced in 1940 by the bomardment of uranium with neutrons by Edwin McMillan and Philip Abelson.
Research Neptunium