Page 132 - Chemistry eBook

What Cannot Bond Through Dipole Attraction?
Any NONPOLAR MOLECULE (a molecule that’s symmetrical) cannot bond through dipole attraction.
What kind of molecule is CH4? Since the molecule is symmetrical, it’s a nonpolar molecule.
A nonpolar molecular cannot have dipole attraction.
Review:
• A polar molecule (asymmetrical) can bond through dipole attraction.
• A nonpolar molecule (symmetrical) cannot bond through dipole attraction.
A polar bond does not necessarily make a polar molecule.
Example: CF4 has a polar bond (two different nonmetals), but it is a nonpolar molecule (because it has symmetry).
132 © UNIT 4: BONDING