| A | B |
| Mixture | two or more elements or compounds not chemically combined |
| Compound | A pure substance containing two or more kinds of atoms |
| Element | A pure substance containing only one kind of atom |
| Periodic Table | Contains over 100 existing elements |
| Homogeneous | uniform mixtures |
| Heterogeneous | non-uniform mixtures |
| Atom | basic unit of matter |
| Colloids | a mixture with small undissolved particles |
| Solute | a substance that is present in a solution in a smaller amount |
| Solvent | substance that dissolves the solute |
| Suspension | a mixture in which particles can be seen and easily separated |
| Molecules | smallest portion of a compound |