-It is a fundamental particle of an atom that revolves around the nucleus having negative charge
Charge~ (-1.6×10^-19coloumb)
Mass~ 9.11×10^-31 kg
Electron speed is just close to speed of light
Electron mass is (1/1837) time’s of mass of proton
*Specific charge- It is defined as the ratio of charge and mass of an electron
* The value of specific charge (e/m) = 1.76×10^11 C/kg
* specific charge of electron is constant and measured by JJ Thomson in 1897
*specific charge related experiments electron beam fine tube meathod, deflection of electron in magnetic field