7. Define atom. Who gave this term ?
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The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be divided. We now know that atoms are made up of three particles: protons, neutrons and electrons — which are composed of even smaller particles, such as quarks.
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the smallest particle of a matter that takes part in a chemical reaction. First it was gave by Democritus nd Leukiposs. Than John Dalton verified it in Eng
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