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JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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The atom with lowest atomic number that has a ground state (EC) of

(n-1) d^6 n s^2

is in the

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Correct option: C

4th period

Option C (4th period) is correct because the electronic configuration

(n-1) d^6 n s^2

indicates a transition metal, and the d-orbitals are first filled in the 4th period (n=4).

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