jan 1, 1904 - J.J Tompson 1904 Thomson discovered electrons and protons while experimenting with cathode rays. He showed that cathode rays were negatively charged. These cathode rays were elections. This discovery deprived Dalton's atomic model.

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Thomson discovered electrons and protons while experimenting with cathode rays. He showed that cathode rays were negatively charged. These cathode rays were elections. This discovery deprived Dalton's atomic model.

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