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The electronic configuration of four elements are given below. Which element does not belong to the same family as others?

1. [Xe]4f145d01s2
2. [Kr]4d105s25p2
3. [Ne]3s23p5
4. [Ar]3d104s2

Correct answer: [Ne]3s23p5

Solution

Option C ([Ne]3s23p5) represents a halogen, while the others belong to different families (transition metals or p-block elements). Thus, C does not belong to the same family.

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