Question

who discovered electrons and how​

Answer 1

Answer:

Thomson

During the 1880s and '90s scientists searched cathode rays for the carrier of the electrical properties in matter. Their work culminated in the discovery by English physicist J.J. Thomson of the electron in 1897.

Answer 2

$\huge \sf \color{springgreen}{J.J.Thomson} \: \: \color{white}{ {e}^{ - } }$