HONORS CHEMISTRY

HOMEWORK 5b.                  Name:  _________________________________________

1.  In each group, predict which bond will be most polar:

a. C-F, Si-F, or Ge-F

b. S-Cl, S-F, or S-Br

c. C-H, Si-H, or Sn-H

d. Al-Br, Ga-Br, In-Br, Tl-Br

e. C-O or Si-O

f. Si-O, P-O, S-O, Cl-O

2. Arrange the following bonds in order of increasing ionic character:
  N-O,   Ca-O,   Ca-F,   Br-Br,   K-F



3. Write complete electron configurations (spdf notation) for the ions Mg2+   and N3-
Remember to add or omit electrons as needed to account for the ionic charge.

 

 



4. Which of the following ions have noble gas configurations?
  Fe2+,   Fe3+,     Sc3+,   Te2-,     Ba2+,   Pt2+  



5. In order from smallest to largest, list (and name) four ions isoelectronic with argon (i.e., having the same electron configuration).

 

 

 

 

 

 

 

 

 

 

 

 

6.  On the reverse side of this page, draw Lewis dot structures for each of the following:

            CO2                 BCl3                 NH3                 SiCl4                      HCN (with C in the middle)