Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-fact-Hard-Class 11
Which of the following elements begins the filling of the 4f orbitals in the sixth period?
A
Cerium
B
Lutetium
C
Rubidium
D
Yttrium
Correct Answer
Option A
Detailed Explanation
Cerium (Z = 58) is the first element where the filling of the 4f orbitals begins, marking the start of the lanthanoid series in the sixth period.
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