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Jan 1, 1000
Democritus
Stated that all things are made up of smaller particles called the atomic theory of the universe! -
Antoine Lavoisier
He named both oxygen and hydrogen and predicted silicon. -
John Dalton
made modern atomic theory -
Plum pudding Atomic Model
discoverd electron -
cathode ray tube
discovered electrons -
J.J. Thomson
He discovered the electrons in an atom. -
Robert milikikan
the charge on the electron -
gold foil experiment
proved atom has nucleus -
Bohr Planetary Model
is used as a symbol for atomic energy -
James chadwick
discovered the neutron
