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15 March, 15:56

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

a. nucleus.

b. proton.

c. neutron.

d. electron.

Answers (2)
  1. M
    15 March, 17:06
    0
    The right answer is D, electron.
  2. D
    15 March, 19:50
    0
    d. electron

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