Question

which of these element belong to the second group? H,N,Ca,S,Be,Ar

Answer 1

Be and Ca belong to second group

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Answer 2

Among the elements mentioned here

Berelium that is be

And calcium that is Ca are from the second group

We check it by the number of electrons in the outermost orbit or valence shell

So we count the valence electrons

Ca - 2, 8, 8, 2 therefore belongs to group 2

Be - 2, 2 therefore it belongs to group 2

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