californium
World Encyclopedia | Date: 2005
californium (symbol Cf) Radioactive metallic element of the
actinide series, first made in 1950 by US nuclear chemist Glenn Seaborg (1912–99) and colleagues at the University of California, Berkeley, by alpha-particle bombardment of the curium isotope Cm
242. Californium presents biological dangers because one microgram releases 170 million neutrons a minute. Properties: at.no. 98; most stable isotope Cf
251 (half-life 800 yr). See also
transuranic elements
© World Encyclopedia 2005, originally published by Oxford University Press 2005.
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