1. AP Chemistry Ms. Paskowski

2.  Forces that occur between molecules.  Intramolecular forces are the forces that bond atoms together to form compounds and diatomic molecules. They are much stronger forces than Intermolecular Forces (IMF) 10.1 Copyright © Houghton Mifflin Company. All rights reserved. Chapter 10 | Slide 2

3.  Dipole = areas of partial charge within a molecule due to the difference in electronegativity of the bonded atoms.  Molecules with dipole moments can attract each other electrostatically  The positive area of one attracts the negative area of the other.  Physically arranged so + and – are aligned.  Only about 1% as strong as covalent or ionic bonds. 10.1 Copyright © Houghton Mifflin Company. All rights reserved. Chapter 10 | Slide 3

4.  Instantaneous dipole that occurs accidentally in a given atom induces a similar dipole in a neighboring atom.  Significant in large atoms/molecules.  Occurs in all molecules, including nonpolar ones. 10.1 Copyright © Houghton Mifflin Company. All rights reserved. Chapter 10 | Slide 4

5. 10.1 Copyright © Houghton Mifflin Company. All rights reserved. Chapter 10 | Slide 5

6.  http://chemmovies.unl.edu/ChemAnime/LON DOND/LONDOND.html http://chemmovies.unl.edu/ChemAnime/LON DOND/LONDOND.html  Animation of the development of London Dispersion Forces (Van der Waals) in a nonpolar molecule