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Practice question

Question

Which of the following elements is classified as an inner-transition element?

Options

Choose one · Correct answer highlighted

Explanation

Inner-transition elements (f-block) include lanthanoids and actinoids. Cerium (Ce, Z=58) has 4f¹, placing it in the f-block. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

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