Californium Cf
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Californium is a radioactive metallic chemical element with symbol Cf and atomic number 98. The element was first made in 1950 at the University of California Radiation Laboratory in Berkeley, by bombarding curium with alpha particles (helium-4 ions). It is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium).
98
Atomic Number
251 u
Atomic Mass
1925.15 K
Melting Point
1173 K
Boiling Point
15.1 g/cm³
Density
null Å
Atomic Radius
null Å
Covalent Radius
1.3
Electronegativity
6.28 eV
First Ionization Energy
-9.73e+1
Electron Affinity
7
Number of Shells
2, 8, 18, 32, 28, 8, 2
Electron Shell Occupations
null J/g
Specific Heat