Question

In which of the following pairs the radii of second
species is greater than that of first?
(1) K, Ca
(2) H, He
(3) Mg, Mg2+
(4) O2-, O-

Answer 1

Answer:

(1) Potassium, Calcium

Answer 2

In which of the following pairs the radii of second species is greater than that of first?

(A)  K, Ca

(B)  H, He

(C)  Mg+, Mg2+

(D)  O2-, O-

Correct Answer  :  B