Question

* Identify the correct point from the following
a) size of Na> size of Na
b) size of Cl size of CI
c) size of Na> size of F
d correct order of size of isoelectronic species will be A/3+> Mg+2 > Na+>Ne >F- >02-M3+
​

Answer 1

All the species are iso-electronic (10e

−

)

For iso-electronic species more the positive change, smaller the ionic radii.

For iso-electronic species more negative change, bigger the ionic radii

Hence the order is ↓

$Mg2+<Na+<F−<O2−$

Hence, the correct option is B.