For Na^+ , Mg^ 2+ , F^- and O^ 2- ; the correct order of increasi… - Vidyadip

MCQ

For $Na^+ , Mg^{2+}, F^-$ and $O^{2-}$; the correct order of increasing Ionic radii is

A
${O^{2 - }} < {F^ - } < N{a^ + } < M{g^{ 2+}}$
B
$N{a^ + } < M{g^{ 2+}} < {F^ - } < {O^{2 - }}$
✓
$M{g^{ 2+}} < N{a^ + } < {F^ - } < {O^{2 - }}$
D
$M{g^{ 2+}} < {O^{2 - }} < N{a^ + } < {F^ - }$

✓

Answer

Correct option: C.

$M{g^{ 2+}} < N{a^ + } < {F^ - } < {O^{2 - }}$

c
All species are isoelectronic $(10e^-)$. isoelectronic series, when negative charge increases the radius of ion increases

$\therefore M{g^{ 2+}} < N{a^ + } < {F^ - } < {O^{2 - }}$

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