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    Question

    Match the following:

    src="https://www.ixambee.com/questionimage/Chapter/1735286080-GS-3.JPG" alt="" /> 
    A 2 3 4 1 Correct Answer Incorrect Answer
    B 2 4 3 1 Correct Answer Incorrect Answer
    C 1 4 3 2 Correct Answer Incorrect Answer
    D 1 3 4 2 Correct Answer Incorrect Answer

    Solution

    1. Goldstein (Proton): Goldstein discovered the proton through his work with cathode ray tubes and canal rays.
    2. Chadwick (Neutron): Chadwick discovered the neutron in 1932, completing the understanding of atomic structure.
    3. J.J. Thomson (Electron): Thomson is credited with the discovery of the electron in 1897 during his cathode ray tube experiments.
    4. John Dalton (Atomic theory): Dalton formulated the atomic theory in the early 19th century, laying the foundation for modern chemistry.

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