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How much does an atom of antimony weigh?

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A labeled periodic table entry for antimony shows its symbol Sb, atomic number 51, atomic weight 121.76, electron configuration, and name. It is a solid, weakly acidic other metal with a rhombohedral crystal structure at room temperature. — antimony Properties of antimony.

The atomic weight of antimony is 121.76 atomic mass units (u).

To determine the mass of a single atom in grams, you can divide the molar mass (121.76 grams per mole) by Avogadro’s number, which is approximately $6.022 \times 10^{23}$ atoms per mole.12

The calculation is as follows:

$\frac{121.76 g/mol}{6.022 \times 10^{23} atoms/mol} \approx 2.02 \times 10^{- 22} grams per atom$

Thus, a single atom of antimony weighs approximately $2.02 \times 10^{- 22}$ grams.