NCERT · Class 11 · Chemistry · Structure of AtomWho discovered the charge-to-mass ratio ($e/m$) of an electron?
Step-by-Step Solution
J.J. Thomson determined the ratio of electrical charge ($e$) to the mass ($m$) of the electron in 1897 using a cathode ray tube.
Detailed Options Breakdown
Option : J.J. Thomson (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 1: Ernest Rutherford
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Structure of Atom.
Option 2: Robert Millikan
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Structure of Atom.
Option 3: James Chadwick
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Structure of Atom.
💡 Study Guide: This question tests core syllabus concepts from Structure of Atom. For formulas, key summaries, and mock exam reference guides, read the full Structure of Atom Revision Notes.