J.J Thompson had been trying to figure out what the structure of an electron was for some time, and one day when he was hungry he had some plum pudding. Apparently the way his plum pudding looked that day that’s what he figured the electron looked like.
Thompson discovered the electron in 1897. Later he then found evidence that the stable elements are able to exist as isotopes and he invented the mass spectrometer.
He then did an experiment to discover the charge to mass ratio of the electron. He wanted to dig deeper into his discovery.
Thompson’s Mass Spectrometer Model. Broken down and labeled.
J.J Thompson’s final model of an electron. Where the pudding is the positively charged cloud and the plums are the electrons.
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