A) \[C{{l}^{-}}\]
B) \[Ar\]
C) \[{{K}^{+}}\]
D) \[C{{a}^{2+}}\]
Correct Answer: A
Solution :
\[\text{Ionic}\,\text{radius}\,\propto \frac{1}{\text{effective}\,\text{nuclear}\,\text{charge}}\]When the , electrons are added in the outer-most orbit, the attractive force of the nucleus on the electron (effective nuclear charge) decreases. So, that after adding electron or in case of-ve ion the ionic radius increases. So, in given alternatives the largest size of \[\text{C}{{\text{l}}^{-}}\]
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