Feb 23 1941 #WWII Glenn Seaborg’s team performs the first chemical identification of a new element, confirming the discovery of plutonium. Plutonium-239, the isotope that will be of major importance for use in nuclear weapons, is discovered as the decay product of neptunium-239. #ManhattanProject #Atomic
https://www.lanl.gov/media/publications/national-security-science/1221-plutonium-timeline