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16 October, 10:05

The billiard ball model was the working model of the atom until thomson discovered the

a. nucleus.

b. proton.

c. neutron.

d. electron.

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Answers (2)
  1. 16 October, 11:14
    0
    The right answer is D, electron.
  2. 16 October, 11:23
    0
    d. electron

    J J Thomson discovered the electron, and it was put in his model of the atom.
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