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WGU (tg) Chemistry Contributors
| Question | Answer |
|---|---|
| Greeks | First suggested the atom Elements comprised of Earth, Air, Fire, Water. |
| Dalton | Atomic Theory (mostly right) except for elements are identical (they are not). |
| Rutherford | Gold Foil Experiment Atom has positive center(nucleus)with electrons moving around the nucleus. Planetary Model of the Atom |
| Thompson | Plum pudding model Cathode Ray Experiment Determined charge to mass ratio of electon. All elements have electrons. |
| Millikan | Oil Drop experiment calculated mass of electron |
| Bohr | Planetary Model of the Atom Electrons move in circular orbits |
| de Broglie | Electron has wave properties |
| Lavoisier | Law of Conservation of Mass |