Question

Why electron is called Universal Particle?

Answer 1

The reason for the electron to be termed a universal particle

1. An electron is called a universal particle because the mass of the electron and the value of its charge remain constant irrespective of the considered material.
2. An electron is a fundamental particle and a proton is not a fundamental particle, that's why the electron is considered a universal particle and not a proton while both of them have a constant mass and charge.
3. Mass of electron$=9.1\times {10}^{-31}Kg$
4. Charge of electron $=1.602\times {10}^{-19}C$

Hence, the electron is called a Universal particle.