what is an atom??.......
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An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element.
so basically we and everything around us is made up of atoms.
The atom is the basic building block for all matter in the universe. Atoms are extremely small and are made up of even smaller particles. The basic particles that make up an atom are electrons, protons, and neutrons.They can undergo chemical reactions, sharing electrons with other atoms.
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