Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O2-, S2-, N3-, P3- ?

Question

Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O2-, S2-, N3-, P3- ? (A) O2- < N3- < S2- < P3- (B) O2- < P3- < N3- < S2- (C) N3- < O2- < P3- < S2- (D) N3- < S2- < O2- < P3-

Tardigrade Admin · Accepted Answer

For isoelectronic species ionic radii decreases as the charge on ion decreases. Further on moving down in a group ionic radii increases. Hence the correct order is O2- < N3- < S2- < P3-

Q. Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species $O^{2 -}, S^{2 -}, N^{3 -}, P^{3 -} ?$

$O^{2 -} < N^{3 -} < S^{2 -} < P^{3 -}$

$O^{2 -} < P^{3 -} < N^{3 -} < S^{2 -}$

$N^{3 -} < O^{2 -} < P^{3 -} < S^{2 -}$

$N^{3 -} < S^{2 -} < O^{2 -} < P^{3 -}$

For isoelectronic species ionic radii decreases as the charge on ion decreases. Further on moving down in a group ionic radii increases. Hence the correct order is
$O^{2 -} < N^{3 -} < S^{2 -} < P^{3 -}$

Q. Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O2−,S2−,N3−,P3−?

O2−<N3−<S2−<P3−

O2−<P3−<N3−<S2−

N3−<O2−<P3−<S2−

N3−<S2−<O2−<P3−