Here's why:
* Elements are the basic building blocks of matter. They cannot be broken down into simpler substances. Oxygen (O) and Carbon (C) are both elements found on the periodic table.
* Compounds are formed when two or more different elements chemically combine in a fixed ratio. For example, carbon dioxide (CO2) is a compound made of one carbon atom and two oxygen atoms.
While oxygen and carbon can combine to form compounds like carbon dioxide, they are distinct elements in their own right.