Question

Amongest LiF and LiI which has more covalent character?

Answer 1

The large size of iodine exerts a more polarizing power to lithium as compared to fluorine and thus has more covalent character than fluorine. Fluorine more over has high electronegativity. So the electrostatic force of attraction between $Li$ and $F$ is very high and high enough to hold the two atoms together. So $LiI$ has more covalent character than $LiF$.