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insens350 [35]
3 years ago
7

What did J.J. Thomson discover about the atom that changed the atomic model previously used?

Chemistry
1 answer:
galina1969 [7]3 years ago
7 0
J.J. Thomson hypothesized and discovered that the atom was not the smallest unit of matter but that instead there were much smaller units. He discovered "sub-atomic particles" which make up atoms. The sub-atomic particle that Thomson discovered was the electron. He discovered this through a process of experiments testing cathode rays.
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