Here's the breakdown:

* Cu represents copper, a transition metal.

* S represents sulfur, a non-metal.

* O₄ represents four oxygen atoms, also non-metals.

Copper sulfate exists in different forms, depending on the number of water molecules attached. The most common form is copper(II) sulfate pentahydrate, which has the formula CuSO₄·5H₂O. This form has five water molecules attached to each copper sulfate molecule.