The Cathode Ray Tube

& Plum Pudding Model

Cathode Ray Tube 1989

JJ Thompson took a Cathode Ray tube and ran a gas through the tube. Then he took that tube and ran a electric charge through it. Then he took a magnet and put the positive side on the top and the negative part on the bottom. Thompson then noticed that the current attracted to the positive pole therefore discovering the Electron

Plum Pudding Model 1897

JJ Thomson made a model of a atom called the "Plum Pudding Model" which was a sphere of positive charged electrons. The only problems with his model was he didn't have any negative or neutral subatomic particles. He thought the that the particles were in a stand still, but in fact the particles were moving inside the atom freely.