J.J. Thomson Sarah Badlis, Jose Melvin Calleja and Bailey Gaul.

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Presentation transcript:

J.J. Thomson Sarah Badlis, Jose Melvin Calleja and Bailey Gaul

Previous Model Dalton concluded that atoms were solid spheres. Thomson wanted to find out the subatomic structure.

Experimental Design Cathode tube Vacuumed discharged tube Two parallel anode plates Shot a cathode ray through the tube Cathode ray was seen by its green glow Ray traveled in a straight line Placed materials into the tube to affect the ray Two magnets- Created a magnetic field A cross A platinum strip A wheel

Thomson’s Conclusions Electrons traveled in straight lines Cross’s shadow Electrons have momentum and kinetic energy Wheel spinning Electrons produce heat when they strike Platinum strip Electrons are negative Deflection to positive side

Based off of his experiment, J. J. Thomson’s “Plum Pudding” atom has a positive charge which contains negative electrons.

Interesting Information Thomson won a Nobel Prize in Physics in Before the outbreak of World War I, Thomson made an extraordinary discovery: the isotope. Thomson died on August 30, 1940 and was buried in Westminster Abbey, near Isaac Newton.

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