Question

cathode rays must travel through a vacuum.

1. label the picture of thomsons model of an atom
2. a
3. b

a. negatively charged electron
b. positively charged material

Explanation:

Thomson's model, also known as the "plum - pudding model", proposed that atoms are composed of a positively charged "soup" with negatively charged electrons embedded within it. So, the small blue spheres (A) are the negatively charged electrons, and the orange background (B) is the positively charged material.

Answer:

1. A: a. Negatively charged electron
2. B: b. Positively charged material