Question

Which one of the following ions has the highest value of ionic radius
A. `O^(2-)`
B. `B^(3+)`
C. `Li^(+)`
D. `F^(-)`

Answer 1

Correct Answer - A
`O^(2-)` has the highest value of ionic radii as this can be explained on the basis of `Z//e{("Nucleus charge")/("No. of electron")}`
Whereas `Z//e` ratio increases, the size decreases and when `Z//e` ratio decreases the size increases.