How did the results of J. J. Thompson's experiments change how scientists thought about atoms?

Answer: The experiments of J. J. Thompson showed that all atoms contained negatively charged subatomic particles or electrons.

Explanation:

He used cathode ray tubes for this experiment, thus proving the theory mentioned above. This British scientist has discovered that particles in cathode rays also have a thousand times smaller mass than any known atom. He was awarded the 1906 Nobel Prize for his contribution to science.