Which of the following fundamental particles have the same mass/kg?
Correct answer: D. Neutron, proton
- A. Electron, neutrino
- B. Electron, proton
- C. Proton, neutrino
- D. Neutron, proton
Explanation
Option D is the best choice because neutrons and protons have mass most close to each other. Option A is wrong because electrons have a greater mass than neutrinos. Option B is wrong because electrons have a much less mass than protons. Option C is wrong because Protons have a much greater mass than neutrinos.
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About Discovery of the Proton
The discovery of the proton follows the study of positive rays, also called canal rays, observed in discharge tubes and later identified as positively charged particles. The work of Goldstein and Rutherford is linked to the proton's charge, relative mass and role in the nuclear model, distinct from the discovery of the electron.
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