* Elements are the building blocks: Elements are the simplest pure substances, made up of only one type of atom (like oxygen, gold, or carbon). There are only about 118 known elements in the entire universe.
* Compounds are combinations: Compounds are formed when two or more different elements combine chemically in a fixed ratio. For example, water (H₂O) is a compound made from hydrogen and oxygen.
* Endless possibilities: Since elements can combine in countless ways, the number of possible compounds is practically unlimited.
Think of it like this: You have a limited set of building blocks (elements), but you can use those blocks to build an incredible variety of structures (compounds).
