The electronic configuration of four elements are given below.

Which elements does not belong to same family as others

[xe] 4f¹⁴ 5d¹⁰6s²

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[kr] 4d¹⁰5s²

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[Ne] 3s² 3p⁵

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[Ar] 3d¹⁰4s²

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Solution

The correct option is C
[Ne] 3s² 3p⁵

b and d belong to same group since each one of them have two 2 electrons in the outermost shell, in contrast element (c) has 7 electrons in the valence shell

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