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JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
The correct order of ionic size of \(N^{3-} , Na^+ ,F^- , Mg^{2+}\) and \(O^{2-}\) is
- A \(Mg^{2+} > Na^+ > F^- > O^{2-} < N^{3-}\)
- B \(N^{3-} < F^- > O^{2-} > Na^+ > Mg^{2+}\)
- C \(Mg^{2+} < Na^+ < F^- < O^{2-} < N^{3-}\)
- D \(N^{3-} > O^{2-} > F^- > Na^+ < Mg^{2+}\)
Answer & Solution
Correct Answer
(C) \(Mg^{2+} < Na^+ < F^- < O^{2-} < N^{3-}\)
Step-by-step Solution
Detailed explanation
Ionic size increases with the addition of electrons and ionic size decreases with the loss of electrons. The nitride ion, has \(10\) electrons in contrast to only \(7\) protons. It has high inter electronic repulsions due to which it has the maximum size. The increasing order of…
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