Chemical element
Dubnium
- Db
- Z = 105
- transition metal
- No stable isotope
Dubnium (Db) is element 105, a transition metal in period 7 and group 5. Its most stable isotope has mass number 268. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolDb
Mass number of the most stable isotope268this element has no stable isotope
Mass in kilograms4.4502447 × 10^-25
Categorytransition metal
Group5
Period7
Blockd-block
Electrons in a neutral atom105
Neutrons in the most common isotope163≈
Quantities
Molar mass268 g/mol
Mass of one mole268 grams
Atoms in one gram2.2470674 × 10^21
Mass of one atom4.4502447 × 10^-22 g
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