Which best describes the effect of j. j. thomson's discovery? a. the accepted model of the atom was changed. b. the accepted model of the atom was supported. c. cathode ray tubes were no longer used in experiments due to poor results. d. cathode ray tubes became the only instrument of use in the study of atoms.

Explanation:

During the 19th century the accepted atomic model was Dalton's. This model postulated the atom was a small indivisible and indestructible mass.

In this context, Thomson wanted to verify if this was true. So he devised an experiment that consisted of using a cathode ray tube, which was nothing more than a glass tube in which the air had mostly been extracted (to generate a vacuum) with wires inserted at both ends, and then pass an electrical charge through the tube to create a fluorescent glow.

Then, with the results of the experiments carried out, Thomson discovered the electron and showed that the atom was not indivisible.

Therefore, the former atomic model was substituted by Thomson's atomic model.

the answer would be a