in Periodic Table by (157 points)
Each and every matter is made up of with smallest particles are known as Atom. Atom neither created nor destroyed .The indivisible particle of any matter is called atom.

1 Answer

by (21 points)
An atom is the basic unit of an element.An atom is a form of matter which can not break down by chemical.The atom is having  of protons,neutrons and electrons.
Example of atom: 
Hydrogen,Helium,Oxygen and Uranium.
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