| Particle | Electron | Proton | Neutron |
| Symbol | e | p | n |
| Nature | Negatively charged | Positively charged | Neutral |
| Relative charge | -1 | +1 | 0 |
| Absolute charge | 1.6 x 10-19 C | 1.6 x 10-19 C | 0 |
| Relative mass | 1/1840 amu | 1 amu | 1 amu |
| Absolute mass | 9 x 10-24 g | 1.6 x 10-24 g | 1.6 x 10-24 g |
Characteristics of Electrons, Protons and Neutrons
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