Here's how to break down the number of atoms in 2Na₂CO₃:

* Na₂CO₃: This represents one molecule of sodium carbonate.

* 2Na₂CO₃: This indicates that we have two molecules of sodium carbonate.

Breakdown:

* Sodium (Na): There are 2 sodium atoms per molecule, and we have 2 molecules, so there are 2 * 2 = 4 sodium atoms

* Carbon (C): There is 1 carbon atom per molecule, and we have 2 molecules, so there are 1 * 2 = 2 carbon atoms

* Oxygen (O): There are 3 oxygen atoms per molecule, and we have 2 molecules, so there are 3 * 2 = 6 oxygen atoms

Therefore, in 2Na₂CO₃, there are:

* 4 sodium atoms

* 2 carbon atoms

* 6 oxygen atoms