Question

In the crystals of which of the following ionic compounds would you expect maximum distance between the centres of the cations and anions?

• A. $LiF$
• B. $CsF$
• C. $CsI$
• D. $LiI$

Answer 1

The correct option is C $CsI$

The ionic radii of $C{s}^{+}$ is highest among the given cations and ionic radii of $I^{-}$ is highest among the given anions. Therefore the maximum distance between the centers of cations and anions occurs in $CsI$.