J. J. Thomson observed that cathod rays are deflected by an electric field - and from this discovered the electron.
electron
JJ Thompson
JJ Thompson
Benjamin Thompson
December 18, 1856
1974
Electrons.
JJ Thompson
JJ thompson
Nowhere. JJ Thomson died in 1940
from his cathode ray tube experiment
I'm pretty sure it was jj. Thompson but i coudnt be sure