Word: transuranian
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...Sharers of the chemistry prize were the University of California's Edwin M. McMillan and Glenn T. Seaborg. Both were leaders of teams that synthesized the "transuranian elements," i.e., elements heavier than uranium (atomic number 92). First made was neptunium (No. 93), which McMillan named after the planet just outside Uranus. Neptunium turns spontaneously into plutonium (No. 94), used in atom bombs. The other transuranian elements, also produced for the first time at Berkeley: americium (No. 95), curium (No. 96), berkelium (No. 97) and californium...
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