A) \[M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}<Al\]
B) \[{{F}^{-}}<Al<N{{a}^{+}}>M{{g}^{2+}}\]
C) \[Al<Mg<{{F}^{-}}<N{{a}^{+}}\]
D) \[N{{a}^{+}}<Al<{{F}^{-}}<M{{g}^{2+}}\]
Correct Answer: A
Solution :
\[M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}<Al\] \[{{F}^{-}}\] has bigger size than \[M{{g}^{2+}}\] and \[N{{a}^{+}}\] due to small nuclear charge.
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