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3 Cards in this Set
- Front
- Back
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At the start of the 19th Century, John Dalton described atoms as(?) And said that (?) |
Solid spheres Different spheres made up the different elements |
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In 1887, JJ Thomson conclude from his experiments that atoms weren't (?) |
Solid spheres |
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His measurements of charge and mass showed that an atom must contain even smaller negatively charged particles called... |
Electrons |
