Question

Which has the lowest anion to cation size ratio??
a.)LiF b.)NaF c.)CsI d.)CsF

Answer 1

CsF has the lowest anion to cation size ratio. Among the given anion F^- size is small and among the given cation Cs⁺ size is large.
So the Size of anion / Size of cation = small for CsF