Yes, copper and sulfur can combine into a compound. The most common compound they form is copper sulfide (CuS).

Here's how it works:

* Copper (Cu) is a metal, and sulfur (S) is a nonmetal.

* When copper and sulfur are heated together, they react chemically to form a new substance with different properties.

* Copper sulfide is a black, solid compound.

The reaction can be represented by the following chemical equation:

Cu + S → CuS

This reaction is an example of a synthesis reaction, where two or more reactants combine to form a single product.