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CGP EDU Academic Team
Published on: August 14, 2026
Assertion: The two rows of elements at the bottom of the periodic table are called the lanthanoids and actinoids.
Reason: The elements after uranium are called trans ‐ uranium elements.
Text Solution
Verified by ExpertsThe correct answer is:
B
The two rows of elements at the bottom of the periodic table, called the lanthanoids Ce ( Z 
58) ‐ Lu ( Z 
7l) and actinoids, Th ( Z 
90) ‐ Lr ( Z 
103) are characterized by the outer electronic configuration 
. The elements after uranium are called trans ‐ uranium elements.
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