31 déc. 1856 - J.J. Thompson

Description:

Discoveries- The electron
- Determined the charge-to-mass ratio of a charged particle
- A charged particle is lighter than a hydrogen atom, the lightest atom
- Discovered that there are particles smaller than the atom

Experiments-
- Measured magnetic and electric fields and their effects on a cathode ray

Models-
- Created the “plum pudding model” which showed the distribution of positive charge