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Chemistry
For N3- >O2->F- and Na+, the order in which their ionic radii varies is
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Q. For $N^{3-} >O^{2-}>F^{-} and Na^{+},$ the order in which their ionic radii varies is
WBJEE
WBJEE 2016
A
$N^{3-}>O^{2-}>F->Na^{+}$
B
$N^{2-}>Na^{+}>O^{2-}>F-$
C
$Na^{+}>O^{2-}>N^{3-}>F-$
D
$O^{2-}>F->Na^{+}>N^{3-}$
Solution:
$N^{3-},O^{2-}, F-$ and $Na^{+}$ are all isoelectronic species. As the atomic number increases, nuclear attraction increases, hence the order of ionic radii
$N^{3-}>O^{2-}>F->Na^{+}$