Californium is the chemical element with atomic number 98 and symbol . It is a actinide. All its isotopes are radioactive. Californium-252 is a neutron source because part of its decay occurs through spontaneous fission; that nuclear process is distinct from oxidation-state changes in its chemical compounds.[ref]
Californium is a synthetic element with the symbol Cf and atomic number 98. It belongs to the actinide series of the periodic table and is classified as a radioactive metal. Californium was first discovered in 1950 by a team of scientists at the University of California, Berkeley, who created it by bombarding curium with neutrons.
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