98 Cf
Actinide
Californium
Used in neutron sources.
Properties of Californium
- Atomic number (Z)
- 98
- Symbol
- Cf
- Atomic mass
- 251 g/mol
- Category
- Actinide
- Group
- 3
- Period
- 7
- Electron configuration
- [Rn] 5f¹⁰ 7s²
- Electronegativity (Pauling)
- 1.3
- Atomic radius
- —
- First ionization energy
- 608 kJ/mol
- Melting point
- 1173 K (899.9 °C)
- Boiling point
- 1743 K (1469.8 °C)
- Density
- 15.1 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1950