dear Student An atom is defined as the basic unit of matter. By basic, we mean that it is thebuilding 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.
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.
Simran Pradhan answered this
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.
Riya Singh answered this
The smallest particle of an element is called atom.