What symbols are used to represent electrons and their mass in physics

What symbols are used to represent electrons and their mass in physics

Electron is one of the negatively charged sub protoplasts. Its charge is 1.6 × 10-19 Coulomb, its mass is 9.10 × 10-31 kg (0.51 MeV / C2), and its energy is 5.11 × 105 EV, which is usually expressed as e -