Here's how to determine the number of atoms in 2Na₂SO₄:

1. Identify the Elements:

* Sodium (Na)

* Sulfur (S)

* Oxygen (O)

2. Count the Atoms per Molecule:

* Sodium (Na): 2 atoms per molecule

* Sulfur (S): 1 atom per molecule

* Oxygen (O): 4 atoms per molecule

3. Calculate the Total Atoms in One Molecule:

* Total atoms in Na₂SO₄ = 2 (Na) + 1 (S) + 4 (O) = 7 atoms

4. Account for the Coefficient:

* The coefficient "2" in front of Na₂SO₄ means there are two molecules of this compound.

* Total atoms in 2Na₂SO₄ = 7 atoms/molecule * 2 molecules = 14 atoms

Therefore, there are 14 atoms in 2Na₂SO₄.