Elements A ,B ,C,D and E have thefollowingelectronic configurations. A : 1 s^(2)2s^(2) 2p^(1) B : 1s^(2)n2s^(2) 2p^(6) 3 s^(2)3p^(1) C : 1 s^(2) 2 s^(2) 2p^(6) 3s^(2) 3p^(3) D : 1 s^(2) 2 s^(2) 2p^(6) 3s^(2) 3p^(5) E : 1 s^(2) 2 s^(2)2p^(6) 3 s^(2) 3p^(6)4s^(2) Whichamongthese will belongto thesame groupin theperiodictable ?

Elements A ,B ,C,D and E have thefollowingelectronic configurations.

1.	Elements A ,B ,C,D and E have thefollowingelectronic configurations. A : 1 s^(2)2s^(2) 2p^(1) B : 1s^(2)n2s^(2) 2p^(6) 3 s^(2)3p^(1) C : 1 s^(2) 2 s^(2) 2p^(6) 3s^(2) 3p^(3) D : 1 s^(2) 2 s^(2) 2p^(6) 3s^(2) 3p^(5) E : 1 s^(2) 2 s^(2)2p^(6) 3 s^(2) 3p^(6)4s^(2) Whichamongthese will belongto thesame groupin theperiodictable ?
Answer» <P> SOLUTION :We known that elements havingsimilarvalenceelectronic configuration belongto THESAME group of theperiodic table .Thereforeelements A and Bhavingthreeelectrons in thevalenceshell i.e., `2 s^(2)2 p^(1)` and`3 s^(2)3p^(1)` respectively belongto the samegroup ,i.e., group13 of theperiodic table