Recognised as Chemical element
Gallium
- Ga
- Z = 31
- post-transition metal
Gallium (Ga) is element 31, a post-transition metal in period 4 and group 13. Its standard atomic weight is 69.723 Da. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolGa
Standard atomic weight69.723atomic mass units (Da)
Mass in kilograms1.1577777 × 10^-25
Categorypost-transition metal
Group13
Period4
Blockp-block
Electrons in a neutral atom31
Neutrons in the most common isotope39≈
Quantities
Molar mass69.723 g/mol
Mass of one mole69.723 grams
Atoms in one gram8.637237 × 10^21
Mass of one atom1.1577777 × 10^-22 g
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