| A | B |
|---|
| Boiling Point | a particular temperature for each substance at which it changes state from a liquid to a gas |
| Melting Point | The particular temperature for each substance at which it changes state from a solid to a liquid |
| Freezing Point | The temperature at which a substance changes state from liquid to a solid |
| Nucleus | An atoms dense center where most of its mass is |
| Neutron | a particular in the nucleus of an atom that has a no net electric charge |
| Proton | A particular in the nucleus of an atom that carries one unit of positive electric charge |
| Element | A pure substance that cannot be broken down into any simplier substances |
| Electron | A particular in space outside the nuclues of an atom that carries on a unit of negative charge |
