How many atoms are in the mole of magnesium

6.02 × 10²³ atoms.

Explanation:

According to the Avogadro number, the one mole of any substance have 6.02 × 10²³ atoms.

The number 6.02 × 10²³ is called Avogadro number. it is the number of atoms, ions or molecules in one gram atoms of element, one gram ions of substance or one gram molecules of a compound.

For one mole of magnesium.

24.305 g of Mg = 1 mole of magnesium =  6.02 × 10²³ atoms of magnesium.

Other example includes:

18 g of water = one mole of water =  6.02 × 10²³ molecules of water.

23 g of sodium = one mole of sodium =  6.02 × 10²³ atoms of sodium.

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