Which one of the following ions has the highest value of ionic radius

O^2-

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B³⁺

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Li⁺

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F^-

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Solution

The correct option is A
O^2-

$O^{- 2}$ has the highest value of ionic radii as this can be explained on the basis of $Z / e {\frac{N u c l e u s c h a r g e}{N o . o f e l e c t r o n}}$
Whereas Z/e ration increases, the size decreases and when Z/e ration decreases the size increases.

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Which of the following ion has smallest ionic radius

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