Question

1. choose the best answer. who theorized that cathode rays were smaller than atoms? crookes thomson dalton rutherford 18. choose the best answer. who discovered the nucleus? thomson proust crookes rutherford

Explanation:

1. J. J. Thomson theorized that cathode - rays were composed of particles (electrons) smaller than atoms.
2. Ernest Rutherford discovered the nucleus through his gold - foil experiment.

Answer:

1. Thomson
2. Rutherford