what is mean by atom
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ATOM
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. ... The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.
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Atom is the basic functional unit of life.
Atom is divided into 3 parts
1, Electron
2. proton
3. Neutron
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