Question

The ionic radii $N^{3-},O^{2-},F^{-}$and $N{a}^{+}$follow the order

• A. $N^{3-}>O^{2-}>F^{-}>N{a}^{+}$
• B. $N{a}^{3-}>N{a}^{+}>O^{2-}>F^{-}$
• C. $N{a}^{+}>O^{2-}>N{a}^{3-}>F^{-}$
• D. $O^{2-}>F^{-}>N{a}^{+}>N{a}^{3-}$

Answer 1

Answer: (A)

$\Rightarrow$ Cations has lower atomic radius that the isolated atom Whereas anions has higher atomic radius than the isolated
$\Rightarrow$ Higher the positive charge, lesser is the atomic radius and higher the negative charge, greater is the atonic radius. So, the increasing order of ionic radii is:-
$N^{3-}>O^{2-}>f^{-}>N{a}^{+}$