Which of the following anions has the smalles | vedclass

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(A) The ionic radius of an ion depends on the number of electron shells and the effective nuclear charge.As we move down a group in the periodic table

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$H^{-}$

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(A) The ionic radius of an ion depends on the number of electron shells and the effective nuclear charge.As we move down a group in the periodic table,the number of electron shells increases,leading to an increase in ionic radius.Comparing the given anions: $H^{-}$ has $1$ shell,$F^{-}$ has $2$ shells,$Cl^{-}$ has $3$ shells,and $Br^{-}$ has $4$ shells.Since $H^{-}$ has the fewest number of electron shells,it has the smallest ionic radius among the given options.

Which of the following anions has the smallest radius?

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