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Californium

Chemical element
Californium is a synthetic chemical element; it has symbol Cf and atomic number 98. The element was first synthesized in 1950 at Lawrence Berkeley National Laboratory, by bombarding curium with alpha particles. Wikipedia
Symbol: Cf
Atomic number: 98
Atomic mass: 251 u
Discovered: March 17, 1950
Melting point: 1,650°F (898.8°C)
Electron configuration: Rn 5f10 7s2