Question
Increasing order of atomic radii is
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Answer
a
All the species are iso-electronic $\left(10 e ^{-}\right)$
All the species are iso-electronic $\left(10 e ^{-}\right)$
For iso-electronic species more the positive change, smaller the ionic radii.
For iso-electronic species more negative change, bigger the ionic radii
Hence the order is $Mg ^{2+}\,<\, Na ^{+}\,<\, F ^{-}\,<\, O ^{2-}$
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