Which ion has the greatest radius among the f | vedclass

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(D) The ionic radius increases as we move down a group in the periodic table due to the addition of new electron shells. Comparing the halide ions $(F

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$I^{-}$

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(D) The ionic radius increases as we move down a group in the periodic table due to the addition of new electron shells. Comparing the halide ions $(F^{-}, Cl^{-}, Br^{-}, I^{-})$,$I^{-}$ belongs to the $5^{th}$ period,while $F^{-}$ belongs to the $2^{nd}$ period,$Cl^{-}$ to the $3^{rd}$ period,and $Br^{-}$ to the $4^{th}$ period. Since $I^{-}$ has the highest number of shells,it has the largest ionic radius. Therefore,the correct option is $(D)$.

Which ion has the greatest radius among the following?

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