A) \[N{{a}^{+}}\]
B) \[{{F}^{-}}\]
C) \[{{O}^{2-}}\]
D) \[N{{H}_{3}}\]
E) None of these
Correct Answer: B
Solution :
In case of isoelectronic anions, the anion having greater number of protons is smallest in size. eg,| \[N_{3}^{-}\] | \[>{{O}^{2-}}\] | \[>{{F}^{-}}\] | |
| No. of \[{{e}^{-}}:\] | 10 | 10 | 110 |
| No. of \[p:\] | 7 | 8 | 9 |
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