Question

The elements which occupy the peaks of ionization energy curve are
A. Na, K, Rb, Cs
B. Na, Mg, Cl, I
C. Cl, Br, I, F
D. He, Ne, Ar, Kr.

Answer 1

Correct Answer - D
Noble gas (He, Ne, Ar, Kr) occupy peaks of ionisation energy curve i.e., these elements have highest ionisation energies in their respective periods.