Q.

The ions O2−,F−,Na+,Mg2+and Al3+are isoelectronic.Their ionic radii show

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a

an increase from O2- to F- and then decrease from Na+ to Al3+

b

a decrease from O2- to F- and then increase from Na+ to Al3+

c

a significant increase from O2- to Al3+

d

a significant decrease from O2- to Al3+

answer is D.

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Detailed Solution

Size ∝1Z(for isoelectronic ion).O2−>F>Na+>Al3+ (Z)    8   9    11   13
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