Question

Which order is correct for ionic radius? (A) S-2> Cl-> F-> O2- (B) S-2> Cl-> O2-> F- (C) S2-> O2-> F-> Cl- (D) O2-> F-> S2-> Cl-​

Answer 1

Answer:

F- and O2- are isoelectronic but nuclear charge of F->O2. Hence, ionic radius of F-<O2-. So the order is F-<O2-<S2-<Br-.