Chem1201PReviewCh6

Chem1201PReviewCh6 - Chemistry 1201 Review/Preview Chapter...

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Chemistry 1201 Review/Preview Chapter Six Review Guide Dr. Saundra McGuire Spring 2007 Electronic Structure of Atoms I. The Wave Nature of Light A. The electromagnetic radiation spectrum illustrates the range and regions of electromagnetic radiation. The spectrum ranges from the high-energy gamma region to the low energy radio wave region and beyond. The visible region of the spectrum ranges from violet (400 nm) to red (750 nm). B. The relationship between the frequency of electromagnetic radiation, the wavelength of the radiation, and the speed of light is given by the following relationship: νλ = c where c is the speed of light (3 X 10 8 m/sec); λ is the wavelength of the radiation; and ν is the frequency. (Do sample exercises 6.1 and 6.2 (without looking at the solution!) for practice using this equation.) II. Quantized Energy and Photons Max Planck theorized that energy can be emitted or absorbed by atoms only in discrete chunks, called quanta. One quantum is the smallest amount of energy that can be transferred. The relationship between the energy of a single quantum and the frequency is given by the following relationship: E = h ν where h = Planck's constant, 6.626 X 10 -34 J-s (See Exercises on page 223 for practice.) III. Line Spectra and the Bohr Model A. Emission spectra (or line spectra) - produced when an excited atom emits energy of specific wavelengths due to the electrons falling from higher to lower energy levels. (See Figure 6.12.) B.
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This note was uploaded on 03/23/2011 for the course CHE 1201 taught by Professor Staff during the Summer '09 term at UC Davis.

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Chem1201PReviewCh6 - Chemistry 1201 Review/Preview Chapter...

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