That describes the chemical formula for copper sulfate, which is written as CuSO₄.

Here's the breakdown:

* Cu: Represents one atom of copper.

* S: Represents one atom of sulfur.

* O₄: Represents four atoms of oxygen.

Copper sulfate is a common chemical compound used in various applications, such as:

* Agriculture: as a fungicide and fertilizer.

* Industry: in the production of batteries, pigments, and textiles.

* Medicine: as a treatment for some medical conditions.