Periodic Trend: Ionic Radius

10. Periodic Properties of the Elements / Periodic Trend: Ionic Radius / Problem 5

Arrange this isoelectronic series in order of increasing atomic radius: Se^2-, Sr²⁺, Rb⁺, Br^-.

Rb⁺< Br^- < Se^2-< Sr²⁺

Se^2-< Sr²⁺< Rb⁺< Br^-

Sr²⁺< Rb⁺< Br^-< Se^2-

Se^2-< Rb⁺< Br^-< Sr²⁺

Arrange this isoelectronic series in order of increasing atomic radius: Se2-, Sr2+, Rb+, Br-.