1. Chapter 11. Modern Atomic Theory
Chemistry
Chapter 11.
Modern Atomic Theory

2. Rutherford’s Model of the Atom

3. Figure 11.3: The wavelength of a wave.

4. Wavelength- (lambda); length of a wave (one full cycle)
Frequency- (nu) number of cycles per second; unit is s-1, aka Hertz or Hz.
 Speed of light x 108 m s-1
Photons- a quantum packet of light energy

5. 11.3 Emission of Energy by Atoms Excited state- when electrons receive energy and move to a higher energy state Ground state- electrons at the lowest possible energy state A quantum package of light is emitted when an electron loses energy and goes from an excited state to a less excited state (maybe all the way down to its ground state).

6. Figure 11.8: An excited lithium atom emitting a photon of red light to drop to a lower energy state.