Lanthanoids are

Chemistry D and F - Block Elements General Characteristics Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 11, 2026

Lanthanoids are

14 elements in the sixth period (atomic no. = 58 to 71) that are filling 4 f sublevel

14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4 f sublevel

14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4 f sublevel

14 elements in the seventh period (atomic no. = 90 to 103) that are filling 4 f sublevel

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The correct answer is:

As sixth period can accommodate only 18 element in the table, 14 member of HF series (atomic number 58 ot 71) are separately accommodated in a horizontal row below the periodic table. These are called as lanthanides.

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