Question

Which of the following order is correct with respect to the radius of the given species?

• A.
  
• B.
• C.
• D.

Answer 1

The correct option is D

Ionic size depends upon the charge on the ion. Higher the negative charge, greater will be the size of an anion. Higher the positive charge, smaller will the size of a cation. Hence, the correct order is $I^{-}>I>I^{+}$.