Lanthanoids are-A. 14 elements in the sixth period (atomic no. 90 to 1 – InterviewSolution

InterviewSolution

1.	Lanthanoids are-A. 14 elements in the sixth period (atomic no. 90 to 103) that are filling 4f sublevelB. 14 elements in the seventh period (atomic no. 90 to 103 ) that are filling 5f sublevelC. 14 elements it the sixth period (atomic no. 58 to 71) that are filling the 4f sublevelD. 14 elements in the seventh period (atomic no. 50 to 71) that are filling 4f sublevel.
Answer» Correct Answer - C

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