WHAT IS KNOWN AS ATOM ?
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An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across
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atom is smallest substance that take part inchemical reaction.
Like o- oxygen
Every substance on earth is made up of atom
You can say in hindi parmanu
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