Q 3157201184
Elements `A , B , C , D` and `E` have the following electronic configurations.
`A : 1s^2 , 2s^2 , 2p^1`
`B : 1 s^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 ?