Chapter 11. Modern Atomic Theory

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Presentation transcript:

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

Rutherford’s Model of the Atom

Figure 11.3: The wavelength of a wave.

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- 3.00 x 108 m s-1 Photons- a quantum packet of light energy

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).

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