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Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.

b. 1H, 7N, 20Ca, 16S, 4 Be, 18Ar Which of these elements belong to the second group?

in Chapter 2: Periodic Classification of Element by Expert (10.7k points) | 225 views

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 1H, 7N, 20Ca, 16S, 4 Be, 18Ar 

Electronic configuration of atoms ::





 4 Be=2,2


Among the given elements, Ca and Be belong to second group. Because both has two electrons in the outermost shell. Thus, these two elements belong to second group.

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