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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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4 f

inner-transition series and

5 f

inner-transition series of elements are termed as, respectively

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Correct option: B

Lanthanoid and actinoid series

Option B (Lanthanoid and actinoid series) is correct because the 4f inner-transition series is called the Lanthanoid series, and the 5f inner-transition series is called the Actinoid series.

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