Why is lithium iodide most covalent in nature among alkali halides? – InterviewSolution

1.

Why is lithium iodide most covalent in nature among alkali halides?

Answer»

Among the alkali metal ions, Li⁺ ion is the smallest cation while among halides, anion I^- has the largest size.
Thus, electron cloud around I^- ion is easily distorted by Li⁺ ion leading to polarisation of anion and covalency.
Also, the difference in electronegativities of Li and I is small.

Hence, lithium iodide is most covalent in nature among alkali halides.

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