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 ________________________