Cathode Ray Tube/Plum Pudding Model

By Abby, Brooke, Sam, Travis

Cathode Ray Tube Experiment

The purpose of the Cathode Ray Tube Experiment was to detect electrons using a vacuum container with negatively charged gas by drawing it to the positively charged pole. In the end, they figured out that electrons were drawn to the positively charged pole. The original layout of the experiment was created in 1897 by a German Chemist named Ferdinand Braun.
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Plum Pudding Model

The Plum Pudding is an Atom model proposed by JJ Thomson in 1904. In this model the negative charged electrons are surrounded by positively charged "pudding" , which balanced out the negative electrons. The Plum Pudding model could not predict why atoms absorbed and emitted spectral lines during experiments because there was no nucleus in the plum pudding model. Later on that's how they discovered the nucleus. Thomson also had troubles with showing how to create a neutral atom when the only particle available was negatively charged. The model is accurate because it showed that negatively-charged particles excised.
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