The section presents a question related to atomic structure, specifically comparing the mass of an atomic nucleus to that of an electron. The question asks how many times heavier the nucleus is than the electron, providing four multiple-choice answers: A (more than 1000 times), B (more than 2000 times), C (more than 5000 times), and D (not determined). The key topics include atomic mass, the comparison of mass between nucleus and electron, and multiple-choice question format.