Recognised as Chemical element
Curium
- Cm
- Z = 96
- actinide
- No stable isotope
Curium (Cm) is element 96, a actinide in period 7. Its most stable isotope has mass number 247. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolCm
Mass number of the most stable isotope247this element has no stable isotope
Mass in kilograms4.1015315 × 10^-25
Categoryactinide
GroupLanthanide/actinide series, with no group number
Period7
Blockf-block
Electrons in a neutral atom96
Neutrons in the most common isotope151≈
Quantities
Molar mass247 g/mol
Mass of one mole247 grams
Atoms in one gram2.4381137 × 10^21
Mass of one atom4.1015315 × 10^-22 g
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