Mixtures and Separations

• Pure substance - consists of only one material
• Mixture - consists of two or more substances that are not chemically combined.
• Element - a pure substance which cannot be split into simpler substances by any chemical process
• Compound - a substance containing two or more different types of elements, bonded chemically in fixed proportions
• Solution - homogeneous mixture of two or more substances where one is usually a liquid
• Suspension - a substance, usually a liquid, containing a minute but visible particles floating in it
• Colloid - a substance, usually a liquid, containing macromolecules held floating substance. The particles do not settle.
• Solvent - liquid capable of dissolving another substance
• Solute - a substance that dissolves in a solvent