Seaborg, Glenn T. Formerly, Lawrence Berkeley Laboratory, University of California, Berkeley, California. Nobelist.
Last reviewed:January 2020
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A chemical element, Fm, atomic number 100, the eleventh element in the actinide series. Fermium does not occur in nature; its discovery and production have been accomplished by artificial nuclear transmutation of lighter elements. Radioactive isotopes of mass number 244–259 have been discovered. The total weight of fermium which has been synthesized is much less than one-millionth of a gram. See also: Actinide elements; Periodic table; Radioactivity
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