Einsteinium is a completely artifical element (atomic number 99) with a very short half-life (a about 1 and a third years). It was first discovered in the fallout from the detonation of the world’s first hydrogen bomb, code Ivy Mike, detonated at Enewetak Atoll on November 1, 1952.
As a trans-uranic element, it is extremely radioactive. It has no known applications other using it to develop other extremely radioactive trans-uranic elements with even higher atomic numbers – so far, it has been employed successfully in the creation of mendelevium (atomic number 101) and unsuccessfully in the attempted creation of ununennium (atomic number 119).
By Haire, R. G., US Department of Energy.
Touched up by Materialscientist at en.wikipedia. – , Haire, Richard G. (2006). “Einsteinium”. In Morss; Edelstein, Norman M.; Fuger, Jean. The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 1-4020-3555-1. p. 1580
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