| A | B |
|---|
| Dalton | Had an atomic theory with 5 main principles. |
| Rutherford | Discovered the nucleus. |
| Thomson | Discovered the electron. |
| Electron | Negatively charged subatomic particle |
| Proton | Positively charged subatomic particle |
| Neutron | Neutrally charged subatomic particle |
| Nucleus | contains protons and neutrons |
| Atomic Number | Tells the number of protons in an atom |
| Mass Number | number of protons plus neutrons in an atom |
| cathode ray tube | experiment that proved the exsistance of the electron |
| Gold foil | experiment which proved the exsistance of the nucleus |
| Planetary Model | Rutherford's model of the atom |
| Plum Pudding Model | Thomson's model of the atom |
| Electron cloud | mostly empty space is in this area |
