The correct identification of the elements in the chemical formula K2SO4 is as follows:
- K represents potassium (K), and there are 2 potassium atoms.
- S represents sulfur (S), and there is 1 sulfur atom.
- O represents oxygen (O), and there are 4 oxygen atoms.
So, the response "2 potassium atoms, 1 sulfur atom, and 4 oxygen atoms" is the correct answer.