The correct increasing order of the ionic radii is
Solution
In isoelectronic species size $\propto \frac{1}{Z}$
<br/><br/>$\mathrm{Ca}^{2+}<\mathrm{K}^{+}<\mathrm{Cl}^{-}<\mathrm{S}^{2-} \text { : Size }$
<br/><br/>$\begin{array}{lllll}Z: & 20 & 19 & 17 & 18\end{array}$
About this question
Subject: Chemistry · Chapter: Periodic Table and Periodicity · Topic: Periodic Trends
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