Matter can be classified into three states: solid, liquid, and gas. Elements are pure substances that cannot be broken down into simpler substances by chemical means. Compounds are substances that are made up of two or more elements that are chemically bonded together. Mixtures are combinations of two or more substances that are not chemically bonded together.

Out of the three states of matter, mixtures are the most commonly found form. Mixtures can be found in all three states of matter: solid (e.g., sand), liquid (e.g., salt water), and gas (e.g., air). Compounds and elements, on the other hand, are typically found in only one or two states of matter. For example, elements are typically found as solids or gases, while compounds can be found as solids, liquids, or gases.

Additionally, mixtures are also more common than compounds and elements in terms of their abundance in the universe. This is because mixtures can be formed easily by combining two or more substances together, while compounds and elements require specific chemical reactions to form.