ap chemistry by diane paskowski. if light is a wave with particle properties, are electrons...
TRANSCRIPT
Development of Quantum Mechanics
WavesAP Chemistry
ByDiane Paskowski
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
DeBroglie’s Question
What could they do next?
Bohr’s model did not work for atoms other than hydrogen
Werner Heisenberg and Erwin Schrodinger developed quantum mechanics independently.
Wave Mechanics/Quantum Mechanics
Schrodinger◦ Emphasized wave properties of the electrons◦ Wave function
Figure 7.10 The Hydrogen Electron Visualized as a Standing Wave Around the Nucleus
Orbital is not an orbit
Electron NOT moving around the nucleus
DO NOT KNOW how it is moving
Most Important Ideas
Probably Heisenberg
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.
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
What does it all mean?