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A, B, C, D and E have the following electronic configuration:

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A, B, C, D and E have the following electronic configuration:

A: 1s2,2s2,2p1

B : 1s2,2s2,2p6,3s2,3p1

C : 1s2, 2s2,2p6,3s2,3p3

D : 1s2, 2s2,2p6,3s2,3p5

E : 1s2, 2s2,2p6,3s2,3p6,4s2

Which among these belong to the same group in the periodic table?

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A and B belong to same group of periodic table because they have same number of valence electrons.

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