atom is stable in nature. there are 3 subatomic particles in the atom- protons(positively charged),electrons(negatively charged),neutrons(neutral).the centre of the atom has neutrons and protons while electrons revolve in circular orbits in the atom. the no. of electrons and protons is equal in an atom. The mass of the atom is concentrated in the centre(nucleus).


Atom is just like a ball shaped and it contains three basic materials called Proton(+ charge),Electron(-charge) and Neutron(no charge)
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Atoms are made up of three basic particles, proton, electron and neutron.
Protons are positively charged particles. Electrons are negatively charged particles. Neutrons are neutral particles. The nucleus (centre) of an atom contains protons and neutrons. Electrons are revolving around the nucleus.