The statement that is not correct for periodic classificati…

Chemistry Classification of Elements and Periodicity Mix Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

The statement that is not correct for periodic classification of elements in Modern periodic table is :

The properties of elements are periodic function of their atomic numbers.

Non-metallic elements are less in number than metallic elements.

For transition elements, the 3d-orbitals are filled with electrons after 3p-orbitals and before 4s-orbitals.

The first ionisation enthalpies of elements generally increase with increase in atomic number as we go along a period.

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The correct answer is:

For transition elements, the 3d-orbitals are filled with electrons after 4s-orbitals and before 4p-orbitals.

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