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Which one of the following is the smalle...

Which one of the following is the smallest in size?

A

`N^(3-)`

B

`O^(2-)`

C

`F^(ɵ)`

D

`Na^(ɵ)`

Text Solution

Verified by Experts

The correct Answer is:
D
All of these are isoelectronic ions (10 electrons).
In isolectronic species, as the number of protons (atomic number) goes on increasing, size goes on decreasing due to stronger attraction on the electrons (Z for N, O, F and Na=7, 8, 9 and 11)
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