An atom has an electronic configuration 2, 8, 5. To which of the following elements, mentioned below with their atomic numbers, it would be chemically similar?

F (9)

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Na (11)

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N (7)

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Ar (18)

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Solution

The correct option is C N (7)
Nitrogen has an electronic configuration - 2, 5 and the given atom has configuration 2, 8, 5. Since both these elements have 5 valence electrons, their chemical properties are similar.

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