Question

why LiF is less ionic then CsF
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Answer 1

Answer:

Because F has less atomic size than Li

Answer 2

The % ionic character depends upon electronegativity difference between the bonded atoms. (In fact ionic bond is formed by the transfer of electron from electropositive atom to electronegative atom) EN diff. is greater in CsF than in LiF. That's why CsF is more ionic than LiF.

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