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Option 1 : 1 and 3 only
The correct answer is 1 i.e 1 and 3 only.
- Metallic nature is directly proportional to electropositive nature. Hence, I is correct.
- Metallic nature in period decreases. Hence, II is incorrect.
- Metallic nature in groups increases. Hence, III is correct.
- Metals lose electrons and are of reducing nature.
- Increase of nuclear charge decreases the tendency to attract electrons.
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