The particles present inside the atom are called as subatomic particles. The atoms are made up of three basic sub-atomic particles which are Proton, Electron and Neutron.
1. Electron: Negatively charged particle present outside the nucleus of an atom.
2. Proton: Protons are positively charged and are present inside the nucleus.
3. Neutron: Neutrons are neutrally charged particles, present within the nucleus of an atom.
The Figure below depicts the three subatomic particles present inside atom.
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