Multiple choice general knowledge science & technology

Joseph Thompson discovered ?

  1. Atom

  2. Proton

  3. Neutron

  4. Electron
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

J.J. Thomson discovered the electron in 1897 through cathode ray tube experiments, demonstrating the existence of negatively charged subatomic particles. This led to his plum pudding model of the atom. Thomson did not discover the atom (Dalton), proton (Rutherford), or neutron (Chadwick).

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