Here's why:
* Elements are the simplest pure substances, made up of only one type of atom (like oxygen, carbon, or hydrogen).
* Compounds are formed by the chemical combination of two or more elements in a fixed ratio (like water, H₂O, or carbon dioxide, CO₂).
* Mixtures are combinations of two or more substances where each substance retains its own properties and can be separated by physical means.
LPG gas is a mixture because it contains both propane (C₃H₈) and butane (C₄H₁₀), which are separate compounds, and they can be separated by physical methods like distillation.
