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Atomic radius increases regularly as one descends a:
APanel
BGroup
CPeriod
DBlock
Answer & Solution
Correct answer: B. Group
1. New shells are added going down the table.
2. The outer electrons sit further from the nucleus.
3. So the radius increases down a group.
_Source: NCERT Class 11 Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._
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