* Ammonium: The ammonium ion is NH₄⁺.
* Tetraoxosulphate (VI): This refers to the sulfate ion, SO₄²⁻. The "tetraoxo" part indicates four oxygen atoms, and the "(VI)" indicates that the sulfur has an oxidation state of +6.
* Putting it together: To balance the charges, we need two ammonium ions (2+ charge) for every one sulfate ion (2- charge). This gives us the formula (NH₄)₂SO₄.
Common Name: Ammonium tetraoxosulphate (VI) is more commonly known as ammonium sulfate.
