Ch. 11, 12 & 14  AO, chemical bonds, & IMF                      test     [80 points]       Chem

Academic Honesty:   The answers on this test are my own and I am using only the allowed set of notes as described in the syllabus.  I have not discussed the test questions with anyone before or during the test nor have I seen the test questions prior to the exam.  If you violate any of the preceding items or do not sign, your semester grade is a F.

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1.  Write the electron configuration of __ and identify the valence electrons and core electrons.  [10 points]

a.   silicon

b.  bromine

2.  Draw / sketch the orbital diagram of __.  [10 points]

a.  phosphorus

b.  carbon

3.  Describe and rationalize the periodic trend in atomic size in a column in the periodic table.  [10 points]

4.  In regards to SF4 ,  [20 points]

a.  draw its Lewis structure

b.  sketch the shape of the molecule

c.  what is the name of the shape of the molecule

d.  what is / are the  bond angles

e.  is it a polar or nonpolar compound ?  justify your answer.


5.  What is the difference between an ionic versus covalent bond ?  [5 points]


6.  Identify and justify the type of IMF in the following compounds.  [15 points]

a.  H2 O

b.  CH2 Br2

c.  CBr4

7.  Describe the basis of London IMF in nonpolar compounds.  [10 points]