Question

The correct order of Radii is

• A. N < Be < B
• B. F\(^{-}\) < O\(^{2-}\) < N\(^{3-}\)
• C. Na < Li < K
• D. Fe\(^{3+}\) < Fe\(^{2+}\) < Fe

Hint:

In ions, the more positive the charge, the smaller the ionic radius.

Answer 1

The Correct Option is D

The size of the ions depends on the nuclear charge and the number of electrons. The order from smallest to largest radius is: Fe\(^{3+}\), Fe\(^{2+}\), and then Fe.