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 Element | A pure substance that cannot be separated into simpler substances by physical or chemical means |
| Metals | An element that is shiny and that conducts heat and electricity well |
| Non-metals | An element that does not have the characteristics of a metal (conducts heat and electricity poorly) |
| Metalloid | Elements that have the properties of both metals and nonmetals |
| Compound | A substance that is composed of two or more elements that are chemically combined |
| Mixture | A combination of two or more substances that are not chemically combined (or react to form a compound) |
| Solution | A mixture composed of particles of two or more substances that are distributed equally among each other |
| Solute | The substance that is dissolved in a solution |
| Concentration | A measure of the amount of solute dissolved in a solvent expressed in g/mL |
| Solubility | The ability of the solute to dissolve in a solvent at a certain temperature |
| Suspension | A mixture in which particles of a substance are dispersed throughout a liquid or gas, but are large enough that they settle out or can be filtered out |
| Colloid | A mixture in which particles of a substance are dispersed throughout a liquid or gas, but are not heavy enough to settle out or to be filtered out |