Recognised as Chemical element
Californium
- Cf
- Z = 98
- actinide
- No stable isotope
Californium (Cf) is element 98, a actinide in period 7. Its most stable isotope has mass number 251. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolCf
Mass number of the most stable isotope251this element has no stable isotope
Mass in kilograms4.1679531 × 10^-25
Categoryactinide
GroupLanthanide/actinide series, with no group number
Period7
Blockf-block
Electrons in a neutral atom98
Neutrons in the most common isotope153≈
Quantities
Molar mass251 g/mol
Mass of one mole251 grams
Atoms in one gram2.3992593 × 10^21
Mass of one atom4.1679531 × 10^-22 g
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