Atom and molecules are the building blocks of matter.The existence of different kinds of matter around us is due to the different types of Atom and molecules present in them. For a long time it was thought that the atoms are indivisible so they do not have an inner structure. we now know that atoms are divisible and they do not have an inner structure. We now know that atoms are divisible and do not have an inner structure. atoms have smaller particles in them which are Subatomic particles.
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