Answer: Sulphur and Oxygen
Explanation: Sulphate ion is [tex]SO_4^{2-}[/tex]. It is polyatomic ion which is formed by the combination of sulphur and oxygen elements in the ratio of 1:4.
It is negatively charged species and thus is named by the name _ate at the end.
It usually exists with positively charged species to get stable. eg: ferrous sulphate ([tex]FeSO_4[/tex])
