1. Atomic model timeline

2. Early ideas of the atom Democritus and Leucippus ~ 2500 Years ago
Atomos = “uncuttable”

3. Dalton’s model (1808) John Dalton Matter consists of individual atoms
Atoms arrange in different combinations to form different compounds

4. Plum-Pudding Model (1904)
J.J. Thomson

5. Nuclear model (1911)
* Ernest Rutherford

6. Bohr model (1913)
*Niels Bohr

7. Quantum mechanical model (1920’s)
*Erwin Schrödinger

8. Quantum mechanical model w/ protons and neutrons
Protons: Ernest Rutherford (1919)
Neutrons: James Chadwick (1932)

10. Discovery of the nucleus
The Gold Foil Experiment
Ernest Rutherford

11. J.J. Thomson

12. Gold foil experiment (1911)
Ernest Rutherford

13. * Most of the atom is empty space
* Something very small and very hard inside each atom

14. Plum pudding Model
JJ Thomson
Nuclear Model
Ernest Rutherford

15. Nuclear Atom