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Abhishek Jhunjhunwala

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2 years ago

On the basis of electronic configuration, how will you identify the first and the last element of a period? 

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Muskan Anand

2 years ago

If the number of valence electron is 1 then the element is said to be the first element of a period, if the number of valence electrons are 8, the element is said to be the last element of a period.

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