Here's how to break down the number of atoms in K₂CO₃:

* K (Potassium): The subscript "2" indicates there are two potassium atoms.

* C (Carbon): There is no subscript for carbon, so there is one carbon atom.

* O (Oxygen): The subscript "3" indicates there are three oxygen atoms.

In summary:

* Potassium (K): 2 atoms

* Carbon (C): 1 atom

* Oxygen (O): 3 atoms