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Which property INCREASES on going down a group?
AAtomic radius
BIonisation energy
CElectronegativity
DNon-metallic character
Answer & Solution
Correct answer: A. Atomic radius
1. Down a group, new electron shells are added with each row.
2. Additional shells push the outermost electrons farther from the nucleus.
3. Atomic radius therefore grows down a group.
4. Ionisation energy and electronegativity both decrease.
5. So atomic radius is the property that increases.
_Source: NCERT Class 10 Science Ch 5 'Periodic Classification of Elements'_
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