spread evenly throughout the model. located at multiple sites in the model. concentrated in the center of the model. positioned outside the center of the model.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In the atomic model that includes a nucleus, the positive charge is
Possibilities:
- spread evenly throughout the model.
- located at multiple sites in the model.
- concentrated in the center of the model.
- positioned outside the center of the model.

concentrated in the center of the model.