what are caue of periodicity
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When elements are placed in the order of their increasing atomic number, the elements having the same number of valence shell electrons is repeated in such a way, so as to fall under the same group. Since, the electronic configuration of the valence shell electrons is same they show similar properties .
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The cause of periodicity of properties of elements is due to the repetition of similar electronic configuration of their atoms in the outermost energy shell after certain regular interval
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The periodic repetition of the elements with similar properties after certain regular interval when atoms are arranged in increasing order of atomic number is called periodicity.
The periodic repetition of the properties is due to the recurrence of the similar valence shell configuration after certain regular interval.
The periodic repetition of the properties is due to the recurrence of the similar valence shell configuration after certain regular interval.
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