Here's why:

* Elements are the simplest pure substances that cannot be broken down further by chemical means. Examples include oxygen (O), carbon (C), and hydrogen (H).

* Compounds are formed when two or more different elements chemically combine in a fixed ratio. The properties of a compound are distinct from those of its constituent elements. For example, water (H₂O) is a compound made of hydrogen and oxygen, and its properties are vastly different from those of hydrogen and oxygen alone.

Let me know if you'd like examples of specific compounds!