Chemical element
Tantalum
- Ta
- Z = 73
- transition metal
Tantalum (Ta) is element 73, a transition metal in period 6 and group 5. Its standard atomic weight is 180.95 Da. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolTa
Standard atomic weight180.95atomic mass units (Da)
Mass in kilograms3.0047454 × 10^-25
Categorytransition metal
Group5
Period6
Blockd-block
Electrons in a neutral atom73
Neutrons in the most common isotope108≈
Quantities
Molar mass180.95 g/mol
Mass of one mole180.95 grams
Atoms in one gram3.3280689 × 10^21
Mass of one atom3.0047454 × 10^-22 g
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