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Question

The cause of periodicity of properties is:


A

Increasing atomic radius

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B

Increasing atomic weights

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C

Number of electrons in the valency orbit

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D

The recurrence of similar outer electronic configuration

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Solution

The correct option is C

The recurrence of similar outer electronic configuration


The recurrence of similar outer electronic configuration is the reason for the periodicity of properties.

Although Mendeleev discovered that properties were periodic and created a table enlisting the elements, he didn't know the reason behind this occurrence.

Chemistry

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