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Question

The correct order of increasing size is:

A
Mg+2<Na+<F<Al+3
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B
F<Al+3<Na+<Mg+2
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C
Al+3<Mg+2<Na+<F
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D
Na+<Al+3<F<Mg2+
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Solution

The correct option is D Al+3<Mg+2<Na+<F
The isoelectronic species radius increases with lower atomic charge. Thus correct order is
Al3+<Mg2+<Na<F

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