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Question
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the same group?
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Solution
The electronic configuration of given elements are :
A: (2, 7)
B: (2, 8, 1)
C: (2, 8, 7)
D: (2, 8, 2)
E: (2, 8, 3)
The elements A and C both have 7 valence electrons. Thus, both the elements belong to the same group.
A: (2, 7)
B: (2, 8, 1)
C: (2, 8, 7)
D: (2, 8, 2)
E: (2, 8, 3)
The elements A and C both have 7 valence electrons. Thus, both the elements belong to the same group.
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