Fun Facts About Californium
Scientists at the University of California, Berkeley laboratories synthesized the first atoms of the element californium. It was created by bombarding a curium target with high energy alpha particles.
Atomic Number: 98
Atomic Weight: 251.0796
Discovery: G.T. Seaborg, S.G. Tompson, A. Ghiorso, K. Street Jr. 1950 (United States)
Electron Configuration: [Rn] 7s2 5f10
Word Origin: State and University of California
Properties: Californium metal has not been produced. Californium (III) is the only ion stable in aqueous solutions. Attempts to reduce or oxidize californium (III) have been unsuccessful. Californium-252 is a very strong neutron emitter.
Isotopes: The isotope Cf-249 results from the beta decay of Bk-249. Heavier isotopes of californium are produced by intense neutron irradiation by the reactions. Cf-249, Cf-250, Cf-251, and Cf-252 have been isolated.
Sources: Californium was first produced in 1950 by bombarding Cm-242 with 35 MeV helium ions.
Element Classification: Radioactive Rare Earth (Actinide)
Density (g/cc): 15.1
Melting Point (K): 900
Atomic Radius (pm): 295
Pauling Negativity Number: 1.3
First Ionizing Energy (kJ/mol): (610)
Oxidation States: 4, 3
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