| Definition | Vocabulary Word |
| Number of electrons in the fourth energy level | |
| Number of electrons in the third energy level | |
| Ring containing electrons | |
| Neutrally charged subatomic particle | |
| Number of electrons in the first energy level | |
| Number of electrons in the second energy level | |
| Positively charged subatomic particle | |
| The outer energy level of an atom | |
| Center of the atom | |
| Negatively charged subatomic particle | |