• question_answer Which one of the following ions has the highest value of ionic radius   [AIEEE 2004] A) ${{O}^{2-}}$ B) ${{B}^{3+}}$ C) $L{{i}^{+}}$ D) ${{F}^{-}}$

${{O}^{-2}}$ has the highest value of ionic radii as this can be explained on the basis of $Z/e\,\,\left\{ \frac{\text{Nucleaus charge}}{\text{No}\text{. of electron}} \right\}$ Whereas Z / e ration increases, the size decreases and when Z / e ration decreases the size increases.