AIPMT PRELIMS2004Chemistry-Periodic Table
AIPMT PRELIMS 2004 Chemistry Lanthanoids MCQ Question
Type: MCQ-fact-Easy-Class 12
Lanthanoids are :-
A
14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sublevel.
B
14 elements in the sixth period (atomic no. 58 to 71) that are filling 4f sublevel
C
14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sublevel
D
14 elements in the sixth period (atomic no. 90 to 103) that are filling 4f sublevel
Correct Answer
Option B
Detailed Explanation
Lanthanoids are elements with atomic numbers 58 to 71, filling the 4f sublevel.
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