Match the following:

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.