Question

1. is responsible for the discovery of the electron. unanswered bohr democritus rutherford thompson

Explanation:

J. J. Thomson is credited with the discovery of the electron in 1897 through his experiments with cathode - ray tubes. Bohr made contributions to atomic structure theory, Democritus was an ancient philosopher who proposed the concept of atoms, and Rutherford is known for his gold - foil experiment and the nuclear model of the atom.

Answer:

Thompson