Increasing order of atomic radii is - Vidyadip

Question

Increasing order of atomic radii is

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Answer

a
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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