NCERT · Class 9 · Science · Structure of the AtomWho discovered the electron?
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Step-by-Step Solution
J.J. Thomson discovered the electron in 1897 using a cathode ray tube. He measured the charge-to-mass ratio of cathode rays and concluded that they consisted of negatively charged particles, which were later named electrons.
Detailed Options Breakdown
Option : E. Goldstein
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Structure of the Atom.
Option 1: J.J. Thomson (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Ernest Rutherford
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Structure of the Atom.
Option 3: James Chadwick
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Structure of the Atom.
💡 Study Guide: This question tests core syllabus concepts from Structure of the Atom. For formulas, key summaries, and mock exam reference guides, read the full Structure of the Atom Revision Notes.