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Answer 5:By taking and inserting it to the Crookes and by experimenting.

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Answer 4: to find atoms and elctrons

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Answer 3:A rod that can determined atoms

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How did he know that he discovered something smaller than an atom

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How did he know that he discovered something smaller than an atom

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Answer 2: because he used a cathode rod

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What did he use to determind what atoms looked like

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What did he use to determind what atoms looked like

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Answer 1:He used a model and he also used and ice cream model.

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J.J. Thomson Video

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He demonstrated that cathode rays were negatively charged. In addition, he studied positively charged particles in neon gas.

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This is the atomic model

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J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube.