| A | B |
|---|
| proton | positve charge sub atomic particle |
| neutron | neutral charge sub atomic particle |
| electron | negative charge subatomic particle |
| rutherford | gold foil experiment |
| Dalton | thought that the atom was a hard sphere the same throughout |
| William Crooke | CRT - Cathode ray tube |
| element | substance that can not be broken down into simpler substances |
| result of Cathode ray experiment | matter must have negative charged particles |
