Question

1. choose the best answer. who proposed the law of definite proportions? thomson crookes proust rutherford 14. choose the best answer. who theorized that cathode rays have a specific mass? crookes dalton thomson rutherford

Explanation:

1. The law of definite proportions was proposed by Proust. It states that a given chemical compound always contains its component elements in fixed ratio by mass.
2. Thomson theorized that cathode - rays have a specific mass. He identified cathode - rays as streams of negatively charged particles (electrons) and measured their charge - to - mass ratio, which led to the understanding of their mass characteristics.

Answer:

1. C. Proust
2. C. Thomson