| Electron | Proton | Neutron | |
| (1) | Electron are present outside the nucleus of an atom. | Proton are present in the nucleus of an atom. | Neutron are present in the nucleus of an atom. |
| (2) | Electron are negatively charged. | Proton are positively charged. | Neutron are neutral. |
| (3) | The mass of an electron is considered to negligible. | The mass of a proton is approximately 2000 times as the mass of an electron. | The mass of neutron is nearly equal to the mass of a proton. |
