JEE Main Chemistry question

Lanthanides are

(A)14 elements in the sixth period (atomic no. = 90 to 103) that are filling sub level.
(B)14 elements in the seventh period (atomic no. = 90 to 103) that are filling sub level.
(C)14 elements in the sixth period (atomic no. = 58 to 71) that are filling sub-level.Correct
(D)14 elements in the seventh period (atomic no. = 58 to 71) that are filling sub-level.

Answer: (C)

Solution

Lanthanides are the 14 elements with atomic numbers 58 (Ce) through 71 (Lu), located in the

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Question ID VK-147356