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Q.

consider the isoelectronic species Na+ , Mg2+, F- and O2-. The correct order of increasing length of their radii is

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a

F−

b

Mg2+

c

O2−

d

O2−

answer is B.

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Detailed Solution

In case of isoelectronic species, ionic radii ∝1 atomic number The ionic radii increases as the positive charge decreases negative charge increases.
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