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Chemistry 121
Some Quantum Considerations I
November 20, 2006
Oregon State University
Dr. Richard L Nafshun
1. [Review from Friday] A student
obtains a red laser pointer. The wavelength
of the red light is 660 nm. What is the speed of the red light? What is the
frequency of the red light? What is the energy of one red light photon? What is the
energy of one mole of red light photons? A student obtains a blue laser pointer.
What is the speed of the blue light? Which has a longer wavelength, the red light
or the blue light? Which has the higher frequency, the red light or the blue light?
Which has the greater energy, the red light or the blue light? Give the relative
positions of red and blue light on the electromagnetic spectrum (light). Place the
following labels on the spectrum: high energy, low energy, high frequency, low
frequency, long wavelength, short wavelength.
2.
Discuss the Bohn Model of the Hydrogen Atom.
3.
Discuss the Bright Line Spectra for Hydrogen. Show the 434.1 nm line corresponds to
the n=5 to n=2 transition.
4.
Which is higher in energy, the n=2 to n=1 transition or n=3 to n=2 transition? Higher
frequency? Longer wavelength?