Quiz Grade _________         Quiz 8       Recitation Section ____
March 29, 1996                   CHM 1045 -- 8:00 am -- Dr. Light
     Names           SSN                Names          SSN

______________________________     ______________________________

______________________________     ______________________________

______________________________     ______________________________

(5)1.For each of the following compounds, draw the best Lewis dot
     structure.  (If more than one resonance structure is "best",
     draw only one).  The central atom is underlined.  Give the
     electron pair geometry, the molecular geometry, and the
     hybridization about the central atom.


CompoundLewis Structure    electron pair   molecular  hybridization
                        geometry        geometry



PCl3








CH2O







(2)2.Draw a three-dimensional representation of PCl3, illustrating
     its molecular geometry.  Draw an arrow by each bond indicating
     its polarity (arrow pointing to more negative end), and
     indicate whether the molecule as a whole will be polar or non-
     polar.









(3)3.Calculate the oxidation number of each atom in each of the
     following compounds:

     Na2Cr2O7                      H2PO3

Na=____  Cr=_____  O=____        H=____  P=____  O=____