| A | B |
|---|
| Democritis | Person who came up with the term "atom" |
| John Dalton | Scientist who first proposed Atomic Theory |
| electron | so small that we ignore its mass |
| neutron | subatomic particle with no charge |
| proton | subatomic particle with positive charge |
| Ernest Rutherford | fired protons at gold foil, observed that most passed through |
| JJ Thompson | Scientist who discovered and named the electron |
| James Chadwick | Discovered the neutron |
| Bohr Model | Model which shows electrons found in orbits around nucleas |
| Electron Cloud Model | Most scientifically accurate model based on probability |
| Mixture | 2 or more substances in same place but not chemically joined |
| Compound | Pure substance made of elements that are chemically joined |
| Gold Foil | Rutherford's experiement that helped him discover protons |
| Atoms | Have no overall electric charge |
| Dalton's atomic theory | Says all elements composed of atoms |
