| A | B |
| Volume | The amount of space an object takes up. |
| Atom | The smallest particle that still behaves like the original matter it came from. |
| Molecule | Two or more atoms joined together |
| Nucleus | A dense area in the center of an atom that contains protons and neutrons. |
| Proton | Small particle inside the nucleus that has a positive (+) electrical charge. |
| Neutron | Smaller particle inside the nucleus that has not electrical charge.In other words it has a neutral charge. |
| Electron | One or more circle the nucleus of an atom.They have a negative (-) electric charge. |
| Element | Matter made up of only one kind of atom. Basic, simple or fundamental. |
| Periodic Table | A chart that scientists use to organize the elements.It means "repeated in a pattern". |