Objectives

You have completed this lesson when you can:

1. For simple molecular elements and compounds, determine the shape of the molecules.

2. Distinguish between bond polarity and molecular polarity.

3. For molecular elements and compounds, which are simple or moderately complex in shape, determine whether the molecules are polar or nonpolar.

4. Describe the general nature of intermolecular forces and discuss how they affect properties such as phase at room temperature, melting point, boiling point, and ability to mix with other substances.

5. Describe the nature of dispersion forces and explain why they are associated with nonpolar molecules.

6. Describe the nature of dipole-dipole forces and explain why they are associated with polar molecules.

7. Describe the nature of hydrogen bonding, identify it as an intermolecular force, and explain what conditions must exist within a molecule for it to occur.

8. Compare the strengths of intermolecular force types. Apply your knowledge of different intermolecular forces to predict relative properties of substances.

9. From the formulas of substances determine which type of intermolecular forces are present in those substances.

10. Describe the nature of ion-dipole bonding and the conditions under which it occurs.