Elements A, B, C, D and E have the following electronic configurations.
A : $1 s^{2} 2 s^{2} 2 p^{1}$
B : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$
C : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}$
D : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}$
E : $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}$
Which among these will belong to the same group in the periodic table.

B and C

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C and E

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D and E

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A and B

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Solution

The correct option is D A and B
Out of these, A and B belong to the same group of the periodic table because they have the same outer electronic configuration, $n s^{2} n p^{1}$ .

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Periodicity

Standard XI Chemistry

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Elements A, B, C, D and E have the following electronic configurations. A : 1s22s22p1 B : 1s22s22p63s23p1 C : 1s22s22p63s23p3 D : 1s22s22p63s23p5 E : 1s22s22p63s23p64s2 Which among these will belong to the same group in the periodic table.

The correct option is D A and B Out of these, A and B belong to the same group of the periodic table because they have the same outer electronic configuration, ns2np1.

The correct option is D A and B
Out of these, A and B belong to the same group of the periodic table because they have the same outer electronic configuration, $n s^{2} n p^{1}$ .