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The increasing order of the ionic radii ...

The increasing order of the ionic radii of the given isoelectronic species is

A

`K^(+),S^(2-),Ca^(2+),Cl^(-)`

B

`Cl^(-),Ca^(2+),K^(+),S^(2-)`

C

`S^(2-),Cl^(-),Ca^(2+),K^(+)`

D

`Ca^(2+),K^(+),Cl^(-),S^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
D
Correct order of increasing ionic radii is
`Ca^(2+)ltK^(+)ltCl^(-)ltS^(2-)`
With increase in nuclear charge. Size decrease in isoelecronic species.
`Ca^(2+)(+20)ltK^(+)(+19)ltCl^(-)(+17)ltS^(2-)(+16)`
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