How was the electron discovered?

Answer 1

J.J. Thompson discovered it in 1897.

In 1896, the British physicist J.J. Thomson,with his colleagues John S. Townsend and H.A. Wilson performed experiments indicating that cathode rays really were unique particles,rather than waves,atom or molecules believed earlier.Thomson made good estimates of both the charge e and the mass m,finding that cathode ray particles,which he called "corpuscles,"had perhaps one thousand of the mass of the least massive ion known : Hydrogen (Atomic Mass : 1u).He showed that their charge to mass ratio,e/m was independent of cathode material.He further showed that the negatively charged particles produced by radioactive materials, by heated material and by illuminated materials were universal.The name electron was again proposed for these particles by the Irish physicist George F. Fitzgerald, and name has since gained universal acceptance.

-Ajlan Wasfi Khan

Answer 2

J.J thomsan discovered electons.

Gases do not conduct electricity under normal conditions. but when subjected to high voltage at a very low pressure gases conduct electricity.Thomsan studied this phenomenon using a device called discharge tbe. He used a glass tube having 2 electrodes sealed into it. The tube was evacuatedso that there was very little air or gas inside it. The electrodes were connected to a source of high voltage. At high enough voltage, the gas started conducting and current started to flow. this led to an electrical dischrge. When studying such dischrges, Thomsan discovered a strem of negatively charged particles were coming from cathode. These particles were later given the name as electrons.

Answer 3

Thomson's experiments with the cathode ray.