Question

Which statement(s) is (are) false for the periodic classification of elements?

• A. The properties of the elements are the periodic functions of their atomic numbers
• B. Non-metallic elements are lesser in number than the metallic elements
• C. The first ionization energies of the elements along a period do not vary in a regular manner with increase in atomic number
• D. For transition elements, the d-electrons are filled monotonically with increase in atomic number
• E. Both (C) and (D)

Answer 1

Answer: (D)

The option ( d) is false as $d$ -electrons do not filled monotonically with the increase in atomic number.