Answer:
B. Thompson - Cathode Ray Tube/Plum Pudding
Step-by-step explanation:
The scientist and the model/experiment that unintentionally discovered the electron was the Thompson's - Cathode Ray Tube/Plum Pudding.
Experiments on the discharge tubes was performed by J.J Thomson in 1897 and this led to the discovery of the electron as a subatomic particle.
The properties of the cathode rays were studied and presented by Thomson in his work at that time.
- He observed that cathode rays move in a straight line normal to the cathode and can cast the shadow of an object placed along their path.
- They possess kinetic energy and so can cause the motion of a mechanical paddle wheel placed along their path
- They attract positive charges and repel negative charges.