Specification reviewed

Question 1

Compare the plum pudding with the nuclear model

Answer 1

In the plum pudding model, there is a positive sphere with negative charge randomly placed within the sphere. There is no empty space. In the nuclear model, there is a central positive, tiny nucleus, with mostly empty space and lots of negative charges a long way from the nucleus.
The mass in the plum pudding model is distributed equally throughout the sphere. The mass in the nuclear model is concentrated in the nucleus.

Question 2

Use the nuclear model to describe atoms

Answer 2

-mostly empty space
-mass is concentrated in dense, positively charged nucleus