Question

12 multiple choice 1 point who discovered the electron? niels bohr john dalton ernest rutherford j.j. thomson

Explanation:

JJ. Thomson discovered the electron in 1897 through his experiments with cathode - ray tubes. Niels Bohr made contributions to atomic structure theory, John Dalton proposed the atomic theory, and Ernest Rutherford is known for his work on the nuclear model of the atom.

Answer:

D. JJ. Thomson