1. WARM UP 1.List the 3 particles found in atoms. 2.Which of the 3 particles (from #1) are in the “cloud?” 3.What are the particles (from #2) doing in the cloud?

2. The Electron Cloud

3. Waves Transmit energy

4. Waves Electromagnetic spectrum –Continuous gradient (radio to gamma)

5. Particles Transmit energy Distinct values

6. Electron Cloud Werner Heisenberg –Electrons move randomly

7. Wave / Particle Duality Albert Einstein –Photoelectric effect Light waves release metal e - Light is both a wave and a particle

8. Wave / Particle Duality Louis de Broglie –e - behave like both particles and waves

9. Electron Cloud Heisenberg Uncertainty Principle –You can’t use the wave and particle at the same time

10. Bohr Model Max Planck –Emission spectra –Levels of energy in e -

11. Bohr Model Niels Bohr –Orbital model e - in rings

12. Bohr Model Light released when e - drop from a higher shell to a lower one

13. WRAP UP 1.Do you like the Bohr model or the electron cloud model better? Why?