Here's why:

* Atoms are the basic building blocks of matter. Carbon is an element, meaning it's a pure substance made up of only one type of atom.

* Elements exist in various forms. Carbon can exist as a single atom, but it commonly forms molecules by bonding with other carbon atoms or other elements.

* Examples of carbon molecules:

* Diamond: A giant molecule where carbon atoms are bonded in a strong, rigid lattice structure.

* Graphite: Another giant molecule where carbon atoms are arranged in sheets that can slide over each other.

* Carbon dioxide (CO2): A molecule consisting of one carbon atom bonded to two oxygen atoms.

So, while carbon is an element made up of carbon atoms, it's rarely found as a single, isolated atom. It typically exists in various molecular forms.