Match these items.
phosgene
1. a halogenated gas that may damage the ozone layer
2. world war i poison gas
benzene
3. a typical reaction of alkenes
addition
4. insecticide
freon
5. aromatic molecule
ddt

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided