Correct order of ionic size is (1) S-2 > P-3 > CH- (2) CI > P-3 > S-2 (3) CH-> S-2 > P-3 (4) P-3 > S-2 > CH- >
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correct order of ionic size is
- s-2>p-3>cl-
- cl->p-3>s-2
- cl ->s-2>p-3
- p-3>s-2>cl-
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Solution
Be2+ is smaller than Mg2+ as Be2+ has one sheel where as Mg2+ has two sheels.
Mg2+ and Na+ are isoelectronic species: Ionic radius ∝1/νc≤ar charge.
CI− and S2− are isoelectronic species: Ionic radius ∝1/νc≤ar charge.
CI− is smaller than BI− as CI− has three shells where as BI− has four shells
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