Chemical element
Uranium
- U
- Z = 92
- actinide
Uranium (U) is element 92, a actinide in period 7. Its standard atomic weight is 238.03 Da. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolU
Standard atomic weight238.03atomic mass units (Da)
Mass in kilograms3.9525811 × 10^-25
Categoryactinide
GroupLanthanide/actinide series, with no group number
Period7
Blockf-block
Electrons in a neutral atom92
Neutrons in the most common isotope146≈
Quantities
Molar mass238.03 g/mol
Mass of one mole238.03 grams
Atoms in one gram2.5299923 × 10^21
Mass of one atom3.9525811 × 10^-22 g
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