What is atom?

dear Student
 An atom is defined as the basic unit of matter. By basic, we mean that it is the building block of matter . It is the smallest particle of an element that can take part in a chemical reaction. Every atom consists of protons, neutrons and electrons.

REGARDS

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An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms.
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Matter is made up of very tiny particles called atom. OR atoms are the basic unit of matter. They are made up of three particles : protons ,neutrons,electrons. OR the smallest particle of a chemical element that can exists is known as atoms.
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The smallest particle of an element is called atom.
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