Q4) Define the following terms:
1) Atom
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2) Pollutants
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1
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An atom is the smallest unit of an element consists of 35 different types of particles from which electrons,protrons and neutrons are fundamental particles.
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1. An atom is the smallest unit of matter. An atom is the smallest particle of an element which retains its chemical identity in all the physical and chemical changes
2. Factors affecting natural function of ecosystem and causing harmful effect on abiotic and biotic factors are called as pollutants. Pollutants make the environment poisonous and unhealthy
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