Californium

Analytical testing dots

Californium is a metallic chemical element with the symbol Cf and atomic number 98. A radioactive transuranic element, californium has very few uses and was discovered by bombarding curium with alpha particles (helium ions).

 

General
Name, Symbol, Number californium, Cf, 98
Chemical series actinides
Group, Period, Block n/a, 7, f
Appearance silvery
Standard atomic weight (251) g·mol-1
Electrons per shell 2, 8, 18, 32, 28, 8, 2
Physical properties
Phase solid
Density (near r.t.) 15.1 g·cm−3
Melting point 1173K
(900°C, 1652°F)
Atomic properties
Oxidation states 2, 3, 4
Electronegativity 1.3 (Pauling scale)
Ionization energies 1st: 608 kJ/mol
Miscellaneous
CAS registry number 7440-71-3

 

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Analytical testing dots

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