Exam Review Questions
Use the diagram and the table below to classify the bond for each listed substance as ionic, covalent,
or polar covalent. Write your answers in the space provided.
1. Cl2
____________________
2. CaCl2
____________________
3. MgO
____________________
4. CO
____________________
5. CCl4
____________________
6. CaO
____________________
ELECTRONEGATIVITY
VALUES
Substance
Value
Calcium (Ca)
Carbon (C)
Chlorine (Cl)
Fluorine (F)
Magnesium (Mg)
Oxygen (O)
Sodium (Na)
1.0
2.5
3.0
4.0
1.2
3.5
0.9
Name the following compounds:
7. Na2CO3
Ionic or covalent
name=________________________________________
8. P2O5
Ionic or covalent
name=________________________________________
9. FeSO4
Ionic or covalent
name=________________________________________
10. GaCl3
Ionic or covalent
name=________________________________________
11. CoBr2
Ionic or covalent
name=________________________________________
12. CO
Ionic or covalent
name=________________________________________
Write the formula for the following:
13. dinitrogen trioxide
Ionic or covalent
formula=__________________________________
14. nitrogen
Ionic or covalent
formula=___________________________________
15. vanadium (V) oxide
Ionic or covalent
formula=___________________________________
16. zinc sulfide
Ionic or covalent
formula=___________________________________
17. silver phosphate
Ionic or covalent
formula=___________________________________
18. cobalt (III) sulfate
Ionic or covalent
formula=___________________________________
19. silicon tetrafluoride
Ionic or covalent
formula=___________________________________
Name the molecular shape. (You can use the models on the exam to build the molecules.)
SHAPE WORD BANK
20. ____________________________ CCl4
Linear
21. ____________________________ PCl5
Trigonal Planar
Bent
22. ____________________________HCN
Tetrahedral
23. ____________________________BF3
Trigonal Pyramidal
Trigonal Bipyramidal
24. ____________________________H2O
Octahedral
Draw the following Lewis Structures:
25. Oxygen molecule (O2)
27. Ionic bonding between Mg and P
26. C2H4
28. CO2
29.) Contrast Ionic and Covalent Bonding:
30.) What is an oxidation number? (What does it indicate?)
31.) What is the octet rule?
32.) Name 5 exceptions to the octet rule: