alleryHow does the metallic character of elements change while moving down a group?
AIt increases
BIt decreases
CIt stays constant
DIt first increases then decreases
Answer & Solution
Correct answer: A. It increases
1. Down a group a new shell is added, raising the valence-nucleus distance.
2. This lowers the effective nuclear charge on the valence electrons.
3. The atom therefore loses electrons more easily, so metallic character increases.
4. Rule out B: decreasing metallic character is the across-a-period trend.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 2 "Periodic Classification of Elements", p.36_
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