The correct sequence of elements in decreasing order of fir… | CGP Edu

Chemistry Classification of Elements and Periodicity Ionisation Energy Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

The correct sequence of elements in decreasing order of first ionisation energy is

A

B

C

D

Text Solution

Verified by Experts

The correct answer is:

. This is due to the presence of fully filled s -orbital in Mg .

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