Chapter 10 Worksheet 1

Drawing Basic Molecular Structures

1. SiF4

2. SeCl2

3. C2H6

Drawing Molecular Structures with Multiple Bonds

4. CO2

5. O2

Draw the Lewis structure and assign a formal charge to each atom.

6. IF5

7. AlH4-

Pick the most important resonance structure for each of the following.

8. BrO3-

9. In which one of the following is the best Lewis structure a resonance structure?a. CO2 (C = central atom)b. ClO3¯ (Cl = central atom)c. COCl2 (C = central atom)d. NO2

+ (N = central atom)e. HCN (C = central atom)

10. Select the best Lewis structure for OF2.

11. Choose the correct Lewis structure and calculate the formal charge of each atom in the most important resonance form.

COS (C is central)