Chemistry Classification of Elements and Periodicity All Topic Question for Revision Test Single Correct MCQ
Published on: August 14, 2026

The cause of periodicity in properties of the elements is the repetition of after certain regular intervals.

A
similar penultimate shell electronic configuration
B
similar antepenultimate shell electronic configuration
C
similar outermost shell electronic configuration
D
similar valence shell electronic configurations

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Text Solution

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The correct answer is:
D

Because with a gradual increase in atomic number, there occurs a repetition of similar valence electronic configurations.

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