A) \[{{N}^{3-}}>{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}\]
B) \[{{N}^{3-}}>N{{a}^{+}}>{{O}^{2-}}>{{F}^{-}}\]
C) \[N{{a}^{+}}>{{O}^{2-}}>{{N}^{3-}}>{{F}^{-}}\]
D) \[{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}>{{N}^{3-}}\]
Correct Answer: A
Solution :
All the given ions are isoelectronic. In case of isoelectronic species as atomic number increases ionic radii of ions decreases. So, \[_{7}{{N}^{3-}}{{>}_{8}}{{O}^{2-}}{{>}_{9}}{{F}^{-}}{{>}_{11}}N{{a}^{+}}\]
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