Arkansas State University  Department of Chemistry and Physics
CHEM4204	Exam 1

1. Plot the Radial and Angular Probability Functions for

  a)  n = 3, l = 2
  b)  n = 4, l = 0                           (10 points)

2.  Using Slater's Rules, which would have the higher atomic radii, Ru or Os? Explain.                      (10 points)

3. If Molecule XY-55 has a m_s.o. of 4.98 BM at room temperature and at 90 K, the m_s.o. of 0.02 BM, explain a plausible reason for the change in the magnetic moment.          (10 points)

4. Using M.O. theory, explain which would be more stable: O₂, O₂^1-, O₂^2-.  (20 points) Show work.

5. Explain the relationship between Rydberg's equation and the Bohr atom.  What does a_o represent?             (10 points)

6. Breifly describe the relationship between Z* and a) ionization energy and b) atomic size.           (10 points)

7. Draw the M.O. diagram for NO showing both case I and II  diagrams.  What is the expected Bond Order?  Indicate the HOMO  and the LUMO.  What is its magnetic properties?  (20 points)

8. L.C.A.O. give three types of overlap.  Describe each one and  tell what type of M.O. that results from each.  (10 points)