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JEE Main 202227 JuneEvening Shift
Exam
JEE Main
Year
2022
Date
27 June
Shift
Evening Shift
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

JEE Main 2022 · 27 June · Evening Shift · Chemistry · Classification of Elements and Periodicity in Properties

The correct order of ionic size of N ^ 3 - , Na ^ + , F ^ - , Mg ^...

The correct order of ionic size of N3−,Na+,F−,Mg2+{N}^{3 -}, {Na}^{+}, {F}^{-}, {Mg}^{2 +} and O2−{O}^{2 -} is :

Options

  1. AMg2+<Na+<F−<O2−<N3−{Mg}^{2 +} < {Na}^{+} < {F}^{-} < {O}^{2 -} < {N}^{3 -}
  2. BN3−<O2−<F<Na+<Mg2+{N}^{3 -} < {O}^{2 -} < F < {Na}^{+} < {Mg}^{2 +}
  3. CF−<Na+<O2−<Mg2+<N3−{F}^{-} < {Na}^{+} < {O}^{2 -} < {Mg}^{2 +} < {N}^{3 -}
  4. DNa+<F−<Mg2+<O2−<N3−{Na}^{+} < {F}^{-} < {Mg}^{2 +} < {O}^{2 -} < {N}^{3 -}

Correct answer

A. Mg2+<Na+<F−<O2−<N3−{Mg}^{2 +} < {Na}^{+} < {F}^{-} < {O}^{2 -} < {N}^{3 -}

Step-by-step solution

These are all isoelectronic species. More the negative charge on the species, more is the size of that ion and more the positive charge on the species, less is the size of that ion.

The correct order of ionic radii isN−3>O−2>F−>Na+>Mg+2(Radii){N}^{- 3} > {O}^{- 2} > {F}^{-} > {Na}^{+} > {Mg}^{+ 2}\left(Radii\right)

(Isoelectronic species)

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