Who is credited with the discovery of the electron?
A. James Chadwick
B. Niels Bohr
C. Ernest Rutherford
D. J. J. Thomson
Answer: Option D
Solution (By JKSSB Mock Tests)
J. J. Thomson discovered the electron in 1897 through his experiments with cathode ray tubes. He demonstrated that cathode rays were actually streams of negatively charged subatomic particles, much smaller than atoms. Rutherford is famous for discovering the nucleus (gold foil experiment), Chadwick discovered the neutron, and Bohr developed the planetary model of the atom.
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