Question

Out of the following statements which is/are correct

• A. H is an element of minimum atomic radius
• B. He is an element of highest I.P.
• C. CI is an element of highest EA
• D. Li is an element of lowest I.P.

Answer 1

Answer: (A), (B), (C)

H is an element of minimum atomic radius
He is an element of highest I.P.
CI is an element of highest EA

(A) The atomic radius of H is minimum and that of Fr is maximum.
(B) The ionization potential of He is highest due to small size, no screening effect and high effective nuclear charge.
(C) The electron affinity is highest for Cl due to the small size and high nuclear charge.
(D) The ionization potential of Cs is lowest.