| A | B |
|---|
| atom | The smallest whole particle of matter |
| Compound | Two or more elements joined together to form a new substance |
| element | substance made of identical atoms |
| Organic compound | compounds which are part of living things |
| Inorganic compound | compounds which do not contain the element carbon |
| Molecule | The smallest amount of a substance |
| Mixture | Two or more substances mixed together but not making anything new |
| Solution | a mixture in which one or more substances mix evenly with other substances |
| electron | particle in an atom with a negative charge |
| proton | particle in an atom with a positive charge |
| neutron | a particle in the atom which does have any charge |
| ion | a charge atom |
| enzyme | proteins which speed up chemical reactions in cells |
