What is a cause of periodicity give example

1.	What is a cause of periodicity give example
Answer» Answer: The cause of periodicity in properties is the repetition of SIMILAR outer electronic configuration after certain REGULAR intervals. Forexample, all the ELEMENTS of GROUP LA i.e., ALKALI metals, have similar outer electronic configuration as ns1.

Answer»

Answer:

The cause of periodicity in properties is the repetition of SIMILAR outer electronic configuration after certain REGULAR intervals. Forexample, all the ELEMENTS of GROUP LA i.e., ALKALI metals, have similar outer electronic configuration as ns1.

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What is a cause of periodicity give example​

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What is a cause of periodicity give example