a lightweight core surrounded by neutral particles a massive core surrounded by negatively-charged particles a network of interacting positive and negative particles overlapping layers of neutral, positive, and negative particles
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which best describes the structure of an atom?
Possibilities:
- a lightweight core surrounded by neutral particles
- a massive core surrounded by negatively-charged particles
- a network of interacting positive and negative particles
- overlapping layers of neutral, positive, and negative particles

a massive core surrounded by negatively-charged particles