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Questions  

Elements A,B, C,D and E have following electronic configurations :

(A) 1s2,2s22p1 (B) 1s2,2s22p6,3s23p1 

(C) 1s2,2s22p6,3s23p3 (D) 1s2,2s22p6,3s23p5

(E) 1s2,2s22p6,3s23p6

Which among the belongs to  same  group in the periodic table?

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detailed solution

Correct option is D

The electronic configuration of Boron is,

1s2,2s22p1
The electronic configuration of Aluminum is,

1s2,2s22p6,3s23p1

Both belongs to same group in the periodic table.

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