1. Sec. 4: Polar Bonds and Molecules
Ch. 8: Covalent Bond
Sec. 4: Polar Bonds and Molecules

2. Bond Polarity
“Tug of War”

3. Bond Polarity Atoms compete for ___________ _________ in a molecule
Nonpolar Molecules
1. Atoms pull ____________
2. Share electrons ____________
3. Ex: Cl2, O2
Polar Molecules
1. One atom ____________ more than the other
2. Electrons share _____________
3. Also called “__________”

4. Bond Polarity

5. Attractions Between Molecules
Dipole Interactions
1. __________ ___________ held together
2. Attraction between _______ _______ __________
3. ________ than covalent or ionic bonds
Hydrogen Bonds
1. Type of __________ __________
2. __________ (+) attracted to atom in another
molecule (-)
3. Hold together molecules of _________

6. Attraction Between Molecules

7. Attractions Between Molecules

8. Attraction Between Molecules
Cohesion
attraction of water molecules to ________ __________ ___________
Adhesion
water molecules attract to_________ ____________
Surface tension
cohesion at the ___________

9. Attraction Between Molecules
Capillary Action
1. Adhesion and _________
2. Water moves ________
3. The narrower the tube, __________ the water.