alleryAtomic radius down a group:
ADecreases
BIncreases
CStays the same
DVaries randomly
Answer & Solution
Correct answer: B. Increases
1. Down a group, electrons are added to new outer shells.
2. The shell number rises by one at each step downward.
3. Added shells outweigh the rise in nuclear charge.
4. So atomic radius increases down a group.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 1 'Periodic Table' (aplustopper.com extract)_
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