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Which scientist's experiment is associated with the discovery of the proton?
ADalton, atomic theory postulates
BThomson, cathode-ray experiment
CBohr, hydrogen spectrum study
DGoldstein, anode-ray experiment
Answer & Solution
Correct answer: D. Goldstein, anode-ray experiment
1. Thomson's cathode-ray work discovered the electron.
2. Goldstein's anode-ray work showed positive particles, leading to the proton.
3. Bohr proposed quantised orbits; Dalton proposed the atomic theory.
4. So option A is correct.
_Source: Selina Concise Chemistry Class 8, Ch on Structure of Atom (Mistral OCR'd PDF), section on discovery of proton_
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