Question

Describe the experiment that led to the discovery of the electron.​

Answer 1

Summary. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.

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Answer 2

In 1867 ; JJ. Thomson , a British physicist, proposed that atom contains atleast one negatively charged particle. Later this particle was named as electron. Thomson called those particles ' corpuscles'.