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5 BCE
Demoritus
During this time the existence of atoms was proposed and thought to be a smaller version of the object, but they didn't have the technology for his theory to be tested. -
Dalton
He developed his theory of atoms and matter using experiments. He used the results to support and prove his hypothesis. -
JJ Thomson
He discovered the electron during an experiment using electric charges in cathode ray rubes. -
Rutherford
The planetary model of the atom was developed, using an experiment were alpha particles where fired at a thin gold foil to see reaction and to record the results. -
Bohr
Bohr developed a model of the atom using the laws of quantum physics. He used his technique to propose his updated version of the model of the atom. -
Chadwick-Bohr Model
James Chadwick discovered the neutron in 1932. He used Kinematics and accurate measurements to prove the existence of the neutron.
