Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-numerical-Medium-Class 11
How many elements are present in the sixth period of the periodic table, and which series begins with cerium in this period?
A
32 elements; Lanthanoid series
B
18 elements; Actinoid series
C
32 elements; Actinoid series
D
18 elements; Lanthanoid series
Correct Answer
Option A
Detailed Explanation
The sixth period contains 32 elements, and the filling up of the 4f orbitals begins with cerium, marking the start of the lanthanoid series.
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