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JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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An ion has 18 electrons in the outermost shell, it is

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Correct option: A

{Cu}^{+}

Option A (

{Cu}^{+}

) is correct because

{Cu}^{+}

has 28 electrons, and its electronic configuration is

1s^22s^22p^63s^23p^63d^{10}

, which has 18 electrons in the outermost shell (3s, 3p, and 3d).

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