Naming Ionic Compounds Containing Halo-Oxyanions

• If there are more than two ions in the series, then the prefixes hypo-, meaning “less than,” and per-, meaning “more than,” are used.

ClO − hypochlorite BrO − hypobromite IO − hypoiodite ClO2− chlorite BrO2− bromite IO2− iodite ClO3− chlorate BrO3− bromate IO3− iodate ClO4− perchlorate BrO4− perbromate IO4− periodate

When naming these ions in the homework, be sure to include the word ion in your answer, as in “perchlorate ion.”