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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.

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Answer:

A. The accepted model of the atom was changed.

Explanation:

Thomson described an atom that has the protons uniformly distributed within a circular atom with the electrons embedded . However, it cannot explain the emission of electrons from the surfaces of metals like photoelectric emission. it does not explain how the particle of the atom contribute significantly to the entire mass of an atom

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