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Question

Electronic configuration of four elements is given below. Which of the following does not belong to the same group?

A
[Kr]4d105s2
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B
[Ar]3d104s2
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C
[Xe]5p66s2
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D
[Xe]4f145d106s2
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Solution

The correct option is C [Xe]5p66s2
The element with electronic configuration [Xe]6s2 is Ba, an alkaline earth metal. It belongs to group IIA. Other elements (Zn, Cd and Hg) are transition metals and belong to group 12 (II B).

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