Californium
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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