Explain the difference in the nature of bonding in LiF and LiI .

Explanation

`LiF to "more ionic, LiI" to "more covalent" `
Both LiF and LiI are expected to be ionic compounds. However, LiI is predominantly covalent because of small size of `Li^(+)` and large size of iodide ion. A smaller cation and a larger anion introduces covalency in ionic compound.