Copper sulfate (CuSO₄) is composed of three types of atoms:

* Copper (Cu): This is the metal atom, providing the characteristic blue color to copper sulfate.

* Sulfur (S): This is a non-metal atom, forming part of the sulfate ion.

* Oxygen (O): This is a non-metal atom, also forming part of the sulfate ion.

The formula CuSO₄ indicates that there is one copper atom, one sulfur atom, and four oxygen atoms in each molecule of copper sulfate.