CHE 11, Fall 1998
Quiz 7
October 30, 1998

Show your work for full credit. Give your answers with the correct number of significant figures.

1. In an investigation of a particular element, it is found that a photon having l = 500 nm provides just enough energy to promote an electron from the second orbit to the third. From this information, we can determine (2 points)

(a) the energy of the n = 2 level.
(b) the energy of the n = 3 level.
(c) the sum of the energies of n = 2 and n = 3.
(d) the difference in energies between n = 2 and n = 3.
(e) all of the above.

2. What is the wavelength of a photon of light that can excite an electron in the hydrogen atom from the n = 1 to the n = 8 energy level? (3 points)

3. Briefly describe the main limitation of Bohr’s model of atomic structure. (2 points)

4. How does the quantum mechanical model of atomic structure differ from Bohr’s model? (3 points)