Ruther ford's scattering experiment demonstrates:
Correct answer: D. The nuclear model of the atom
- A. The existence of X-rays
- B. The existence of negative particles
- C. The mass to charge ratio of the electron
- D. The nuclear model of the atom
Explanation
Rutherford's gold foil experiment was a pivotal moment in atomic physics. It demonstrated that the atom consists of a tiny, dense nucleus containing most of its mass, which caused the deflection of some alpha particles. This experiment refuted the plum pudding model and led to the nuclear model of the atom, where electrons orbit a central nucleus. The other options are incorrect because they relate to different discoveries: X-rays were discovered by Roentgen, J.J. Thomson demonstrated the existence of electrons, and he also found the mass to charge ratio of the electron.
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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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