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Thomson's cathode ray beam bent towards the positively charged plate. With this information, he was able to conclude

the beam had no charge.

the beam was negatively charged.

the beam contained no particles.

the beam contained protons.

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MissPhiladelphia
I believe the correct answer from the choices listed above is the second option. With this information, he was able to conclude that the beam was negatively charged. His cathode ray tube experiments led to a very important scientific discovery, the electron. Hope this answers the question.
ogechukwubenedict

Answer: the beam was negatively charged

Explanation: Thomson has been experimenting with cathode ray tubes. By applying a high voltage at one end of the tube he was able to initiate the flow of particles or beam from the cathode (the negatively-charged electrode) to the anode (the positively-charged electrode). The bending of the rays to the anode indicated that particles in the beam were negatively charged (since opposite charges attract) and this led to the discovery of electrons.

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