| A | B |
|---|
| substance | anything/matter |
| particle | small part of the substance |
| atoms | building blocks of matter; smallest part of an element |
| elements | one of more of the same atoms |
| molecules | 2 or more of an atom or element |
| compound | chemical structure made up of two or more atoms or elements |
| protons | positively charged particles |
| neutrons | neutral particles in the nucleus |
| electrons | negatively charged particles |
