Concept:A nuclear reaction involves a change in the nucleus of an atom, not merely a change in electrons.
Explanation:A nuclear reaction occurs when a nucleus collides with another nucleus or a subatomic particle, producing one or more new nuclides.
It changes the composition or energy state of the nucleus itself.
Chemical reactions depend on temperature and pressure, but nuclear reactions are generally not governed by these factors.
Nuclear reactions can involve neutrons, protons, alpha particles, gamma rays, and other particles, not only neutrons or only protons and electrons.
Therefore, the correct statement is that the reaction takes place inside the nucleus.
Answer:B. takes place inside the nucleus