Which of the following is the incorrect order | vedclass

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(D) For isoelectronic species,the ionic radius decreases as the nuclear charge increases. In option $A$,$B$,and $C$,the ions are isoelectronic or foll

Vedclass · Accepted Answer

$O^{-2} > Rb^{+} > Sr^{+2} > Cs^{+}$

Vedclass · Answer

(D) For isoelectronic species,the ionic radius decreases as the nuclear charge increases. In option $A$,$B$,and $C$,the ions are isoelectronic or follow the trend of decreasing size with increasing positive charge. In option $D$,the order is incorrect because $Cs^{+}$ ($6^{th}$ period) has a much larger ionic radius than $O^{-2}$ ($2^{nd}$ period). The correct order for the ions in option $D$ is $Cs^{+} > Rb^{+} > Sr^{+2} > O^{-2}$.

Which of the following is the incorrect order of ionic radius?

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