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Quantum Numbers

The cause of ...

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 D
The recurrence of similar outer electronic configuration

The recurrence of similar outer electronic configuration after certain regular intervals (2,8,8,18,18,32) are called magic numbers.

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