Question

Among the following, which one has the highest cation to anion size ratio?

• A. CsI
• B. CsF
• C. LiF
• D. NaF

Hint:

The cation-to-anion size ratio can be determined by comparing the ionic radii of the ions in a compound.

Answer 1

The Correct Option is B

To find the highest cation to anion size ratio, we compare the ionic radii of the cations and anions in each compound. CsF has the highest ratio due to the relatively larger size of the cesium ion compared to the fluoride ion.

Step 2: Conclusion.
The compound with the highest cation to anion size ratio is CsF, corresponding to option (b).