3. in which of the following are the symbol and name of the ion given correctly? *
a. nh4^+: ammonia; h^+: hydride
b. oh^-: hydroxide; o^-2: oxide
c. po3^-3: phosphide; po4^-3: phosphate
d. no3^-: nitrite; n^-3: nitride
4. why are systematic names use more than common names? *
a. common names were assigned by the scientist who discovered the compound
b. common names are not very descriptive
c. common names are derived from the method used to manufacture the compound
d. common names do not provide information about the chemical make-up of the compound