1. For oxoanions families with two members: a. The ion with more O atoms takes the nonmetal root and the suffix-ate b. The ion with fewer O atoms takes the nonmetal root and the suffix-ite 2. For oxoanion familes with four members: a. The ion with the most O atoms takes the nonmetal root, the prefix per- and the suffix-ate b. The ion with 1 fewer O atom takes the nonmetal root and the suffix-ate c. The ion with 2 fewer O atoms takes the nonmetal root and the suffix-ite d. The ion with the fewest O atoms (3 fewer) takes the nonmetal root, the prefix hypo- and the suffix-ite