Californium is a synthetic radioactive metallic chemical element. Its atomic number is 98 and it is represented with the chemical symbol Cf. It was discovered in 1950 by the researchers of University of California, Berkeley. It was first discovered by Stanley Gerald Thompson, an American chemist, Glenn Theodore Seaborg an American scientist and Albert Ghiorso an American nuclear scientist. It was created by cannonade curium with helium ions. In 1951, Glenn Theodore Seaborg won the Noble Prize for his great works in the field of Chemistry.