negatively charged and has a negligible mass negatively charged and part of the nucleus positively charged and part of the nucleus negatively charged and orbits the nucleus
I gave my students this multiple choice question: Which best describes a proton?

Only one answer is correct among these 4 choices:
- negatively charged and has a negligible mass
- negatively charged and part of the nucleus
- positively charged and part of the nucleus
- negatively charged and orbits the nucleus

Could you tell me which one is correct?

positively charged and part of the nucleus