Element A, B, C, D and E have the following electronic configurations
A: ` 1s ^(2) 2s ^(2) 2p ^(1) `
`B: 1s ^(2) 2s ^(2) 2p ^(6) 3s ^(2) 3p ^(1)`
`C:1s ^(2) 2s ^(2) 2p ^(6)3s ^(2) 3p ^(3)`
`D: 1s ^(2) 2s ^(2) 2p ^(6) 3s ^(2) 3p^(5)`
`E : 1s ^(2) 2s ^(2) 2p ^(6) 3s ^(2) 3p ^(6) 4s ^(2)`
Which among these will belong to the same group in the periodic table ?

Explanation

We known that elements having similar valence electronic configuration belong to the same group of the periodic table .Therefore elements A and B having three electrons in the valence shell i.e., `2 s^(2) 2 p^(1)` and `3 s^(2) 3p^(1)` respectively belong to the same group ,i.e., group 13 of the periodic table