| A | B |
|---|
| Nucleus | The central core of the atom. |
| Protons | Positive particle located within the nucleus of an atom. |
| Neutrons | Neutrally charged particles located within the nucleus of an atom. |
| Electrons | Energetic negatively charged particles moving in all directions around the nucleus. |
| Atomic Number | The number of protons in an atom's nucleus. A unique number that identifies that element on the periodic table. |
| Atomic Mass Unit | The mass of a proton is used as this unit of measure. |
| Valence Electrons | The electrons that are farthest from the nucleus and are involvled with bonding amongst atoms. |
| Electron Dot Diagram | A symbol of an element surrounded by dots is called... |
