The chemical formula K2SO4 represents:
- K: Potassium
- S: Sulfur
- O: Oxygen
In the formula K2SO4:
- There are 2 potassium (K) atoms.
- There is 1 sulfur (S) atom.
- There are 4 oxygen (O) atoms.
Therefore, the correct response is: 2 potassium atoms, 1 sulfur atom, and 4 oxygen atoms.