The chemical compound with the chemical formula K2SO4 consists of potassium (K), sulfur (S) and oxygen (O) elements. 2 atoms of potassium, 1 atom of sulfur and 4 atoms of oxygen combine to form one molecule of K2SO4. For this reason, the compound consists of 3 elements. They are: potassium with symbol K, sulfur with symbol S and oxygen with symbol O.