a class of organic compound where one or more alkane-hydrogen atoms has been replaced with a group 7A halogen. Halogens can be: F, Cl, Br, or I.
- 1. moderately polar
- 2. good solvents and aerosol propellants
- 3. CFC's (used in refrigerator and air conditioner)
- 4. non-toxic, non-flammable, non-corrosive
- 5. can damage earth's ozone layer