Final answer:
An element consists of only one type of atom, a compound is made up of different elements chemically bonded together, and a mixture is a combination of substances that are not chemically bonded.
Step-by-step explanation:
An element is a pure substance made up of only one type of atom. It cannot be broken down into simpler substances. Examples of elements include oxygen, carbon, and gold.
A compound is a substance made up of two or more different elements chemically bonded together. The elements in a compound are present in fixed ratios. Examples of compounds include water (H2O) and carbon dioxide (CO2).
A mixture is a combination of two or more substances that are not chemically bonded together. Each substance retains its own unique properties. Examples of mixtures include saltwater and air.
Learn more about differences between elements, compounds, and mixtures