This property is the deflecton in an electrical field.
J. J. Thomson discovered the electron (particle carrying negative charge) in 1897.
J.J. Thomson discovered the electron studying the deflection of cathode rays.
Millikan found the charge of an electron by his famous oil drop experiment. J J Thomson determined the specific charge of the electron. That means the ratio of the charge of an electron to its mass. With these two values one can find the mass of electron by dividing the charge value by its specific charge.
J. J. Thomson observed that cathod rays are deflected by an electric field - and from this discovered the electron.
I suspect you want J J Thomson. 1856-1940 Discovered the electron and isotopes, invented mass spectrometer.
This particle was the electron in 1897 (J.J. Thomson).
The electron
J. Thomson discovered the electron.
JJ Thomson
J.J.Thomson has discovered the electron in 1897
John Joseph Thomson (J.J. Thomson)
J. J. Thomson discovered the electron (particle carrying negative charge) in 1897.
J.j. Thomson
jj Thomson discovered the electron in the early 1900s
Proton discovered by Ernest Rutherford Neutron discovered by James Chadwick Electron discovered by J. J. Thomson
J. J. Thomson discovered the electron and the isotopes.
J. Thomson discovered the electron.