The statement that is not correct for the periodic classification of elements is
The properties of elements are periodic functions of their atomic numbers.
Non-metallic elements are lesser in number than metallic elements.
Electronegativity of the elements along the period from left to right increases in a regular manner.
For transition elements the d-subshells are filled with the electrons monotonically with increase in atomic number.

Options

A. The properties of elements are periodic functions of their atomic numbers.
B. Non-metallic elements are lesser in number than metallic elements.
C. Electronegativity of the elements along the period from left to right increases in a regular manner.
D. For transition elements the d-subshells are filled with the electrons monotonically with increase in atomic number.

Answer

D

Explanation

d-subshells are not filled monotonically, regularity breaks at chromium and copper.