Which of correct about ionisation potential?

Options

A. It is independent of atomic radii
B. It increases with increase in atomic radii
C. it remains constant with increase in atomic radii
D. It decrease with increase in atomic radii

Answer

D

Explanation

We know that ionisation potential gradually decreases of moving down the group while atomic size increase as we move down the group. Hence, the larger the atomic size, the smaller is ionisation potential.