Atomic Properties
- Atomic Number
- 98
- Atomic Mass
- 251.0000 u
- Electron Configuration
- [Rn] 5f10 7s2
- Electronegativity
- 1.30
- Block
- f-block
- Group
- —
- Period
- 7
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 1173.00 K
- Boiling Point
- 1743.00 K
- Density
- 15.1000 g/cm³
About Californium
Named after California; used as neutron source in nuclear reactors.
Isotopes of Californium
Californium has 0 naturally occurring isotopes, plus 4 notable radioactive isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 249Cf | 249 | 249.0748539 | — | Radioactive |
| 250Cf | 250 | 250.0764062 | — | Radioactive |
| 251Cf | 251 | 251.0795886 | — | Radioactive |
| 252Cf | 252 | 252.0816272 | — | Radioactive |
Data source: NIH PubChem (aggregated from IUPAC, NIST)