* Elements are the simplest pure substances, made up of only one type of atom (like gold, oxygen, or carbon).

* Compounds are formed when two or more different elements chemically combine in a fixed ratio (like water, H₂O, or salt, NaCl).

* Mixtures are combinations of different substances where each substance retains its own properties. The substances in a mixture are not chemically bonded.

Example:

Imagine a bowl of fruit salad. It contains different fruits (compounds like sugars, fibers, etc.) but they aren't chemically bonded. You can easily separate the individual fruits.

Key Characteristics of Mixtures:

* Variable composition: The ratio of components can vary.

* No chemical reaction: The components retain their original properties.

* Easily separated: The components can often be separated by physical means (filtration, evaporation, etc.).