Question

Choose the correct sequence of the following ions in increasing order of their ionic radii.

(a) Be²⁺< Li¹⁺ <F^1– < O^2– 

(b) Li¹⁺< Be²⁺ < O^2– < F^1– 

(c) O^2–< F^1– < Li¹⁺ < Be²⁺ 

(d) Li¹⁺< Be²⁺ <F^1– < O^2–

Answer 1

Correct option: (a) Be²⁺< Li¹⁺ <F^1– < O^2– 

Explanation: 

As the charge on anion increases, ionic radii increases.

As the charge on cation increases, ionic radii decreases.