* Coefficients: The "2" in front of the formula represents 2 *complete* units of Na₂SO₄.

* Subscripts: The subscripts indicate the number of atoms of each element within a single unit.

Let's calculate the atoms:

* Sodium (Na): 2 units * 2 Na atoms/unit = 4 Na atoms

* Sulfur (S): 2 units * 1 S atom/unit = 2 S atoms

* Oxygen (O): 2 units * 4 O atoms/unit = 8 O atoms

Therefore, the formula 2Na₂SO₄ contains 4 sodium atoms, 2 sulfur atoms, and 8 oxygen atoms.