Chemistry: Molecular Approach (4th Edition)

a. $Cl^-$ b. $HS{O_3}^-$ c. $CH{O_2}^-$ d. $F^-$
1. Remove one hydrogen from their formulas: a. $Cl$ b. $HSO_3$ c. $CHO_2$ d. $F$ 2. Decrease their charges by one: a. $Cl^-$ b. $HS{O_3}^-$ c. $CH{O_2}^-$ d. $F^-$