AIPMT PRELIMS 2004 Chemistry Lanthanoids MCQ Question
Lanthanoids are :-
14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sublevel.
14 elements in the sixth period (atomic no. 58 to 71) that are filling 4f sublevel
14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sublevel
14 elements in the sixth period (atomic no. 90 to 103) that are filling 4f sublevel
Correct Answer
Detailed Explanation
Lanthanoids are elements with atomic numbers 58 to 71, filling the 4f sublevel.
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