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460 BCE
Democritus atom experiment
Called the atom an atom because in Greek atom means invisible. He called it this because he thought it couldn't be broken down into smaller parts. -
Period: 460 BCE to
History of the Atom
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Dalton atom experiment
Dalton concluded that the sizes of the particles making up different gases are different. -
Thomson atom experiment
Thomson discovered the electrons. He discovered them by showing cathode rays that were particles with a negative charge, and it was much smaller than an atom. -
Rutherford atom experiment
Rutherford and his team shot alpha-particles on a gold foil. This showed the atom had a central charge -
Bohr atom experiment
Bohr's experiment showed electrons jump between energy levels by using many ideas of Rutherford's, and this is why it's called the Bohr-Rutherford model.