A) \[M{{g}^{2+}}\]
B) \[S{{i}^{4+}}\]
C) \[A{{l}^{3+}}\]
D) \[{{P}^{3-}}\]
Correct Answer: B
Solution :
\[{{P}^{3-}}\] is larger in size than all other ions due to having more shell than these. All other species are isoelectronic, hence the ion having higher nuclear charge will have smaller size. Hence, \[S{{i}^{4+}}\](nuclear charge = 14) is smallest in size among these.
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