Name:  _____________________                                 date:  __________________                           period: _______

ch. 12 Lewis structure, VSEPR, molecular polarity     test      35 points                                chemistry

1. In regards to ___, sketch the shape of the molecule and fill-in the blanks; justify / rationalize your answer.  [10 points]

a. SeCl4

i. Bond angle(s)  =  ___________

ii. Name of shape of molecule =  __________________

b.  PH3

i. Bond angle(s)  =  ___________

ii.  Name of shape of molecule =  __________________

2. Sketch all Lewis structure(s) for nitrate.  [5 points]

3. Based on your preceding answer, is it a polar or nonpolar compound ?  justify / rationalize your response.  [10 points]

a. SeCl4

b. PH3

4.  What is the relative bond angles between CH4, H2O, and NH3 ?  justify / rationalize your answer.  [10 points]