what is atom? who modern idea of atom
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Explanation:
Atom is the smallest particle of a chemical element that can exist.
The concept that atoms play a fundamental role in chemistry is formalized by the modern atomic theory, which states that all matter is composed of atoms. Atoms themselves are composed of protons, neutrons, and electrons. Each element has its own atomic number, which is equal to the number of protons in its nucleus, first stated by John Dalton, an English scientist, in 1808. It consists of three parts.
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