CHM 2045C Sample Exam             Name: ____________________

 

Module Four: Part A: Bond Recognition                                      4 points

Using a periodic chart, classify each element in the pair as a metal or nonmetal, then predict the bond type that should exist between the two elements. (Assume all metal-nonmetal combinations have an electronegativity difference greater than 1.7)

 

1.         Na-Cl           ________________             4.    Cu-Fe    ________________

 

2.         Mg-O           ________________              5.    Si-S      ________________

 

3.         S-O              ________________

 

 

Module Four: Part C    Binary Molecular Compounds      4 points

Using a periodic chart write the names or formulas of the following compounds depending on whether the formula or name is given:

 

1.    CO       _____________________

 

2.    SO3     _____________________

 

3.    N2O5   _____________________

 

4.    Phosphorus trichloride          _________

 

5.    Boron trifluoride                     _________

 

 

 

Module Three: Part D       Binary Ionic Compounds             4 points

Using a periodic chart, write the names or the balanced formulas for the following compounds depending on whether the formula or the name is given:

 

1.   Copper II phosphide                _________

 

2.    Iron III Oxide                           _________

 

3.    Lead IV sulfide                        _________

 

4.   MgCl2        ________________________

 

5.    NiF2         ________________________