1. AP Chemistry By Diane Paskowski

2.  If light is a wave with particle properties, are electrons particles with wave properties?  C. J. Davisson and L. H. Germier at Bell labs proved that electrons produce diffraction patterns and verified deBroglies hypothesis

3.  Bohr’s model did not work for atoms other than hydrogen  Werner Heisenberg and Erwin Schrodinger developed quantum mechanics independently.

4.  Schrodinger ◦ Emphasized wave properties of the electrons ◦ Wave function

6.  Orbital is not an orbit  Electron NOT moving around the nucleus  DO NOT KNOW how it is moving

7.  Heisenberg Uncertainty Principle ◦ There is a fundamental limitation to just how precisely we can know both the position and momentum of a particle at a given time.

8.  Wave function has no easily visualized physical meaning  Square of the function indicates the probability of finding an electron near a particular point in space  Probabilty distribution defines the orbital