Who discovered the electron and when?
The electron is a fundamental subatomic particle that was
identified and assigned the negative charge in 1897 by Sir John
Joseph Thomson (J.J. Thomson) and his team of British
Answered by Bushra wali. The particles of the atom that is ;Electron,Proton,neutron are not discovered by the same person but they are discovered by different person. Discoverer of Electron. The electron which carry a negative charge is discovered by Joseph Jhon Thomson. Discoverer of Proton and Neutron' The proton is discovered by Rutherford where as neutron is discover by chadwick.