-
Disagreed with Democritus`s idea that atoms move through empty space.
-
First person to suggest that matter could not be infinitly divided.
-
"Atoms are the smallest particles of matter and are indivisble and indestructible.
-
Concluded that the mass of the particle was much less than that of the Hydrogen atom, which disproved Dalton`s theory that atom were indivsible
-
Determined that the magnitude of the charge of the electron was 1.602x10 ^-19 coulombs
-
Studied how positively charged a-particles interacted with sold matter.
-
Demonstrated that the nucleus had another neutral subatomic particle, the neutron
-
Discovery of the neutron.