which two types of particles sit tightly together in the nucleus at the center of an atom? magnetrons…

which two types of particles sit tightly together in the nucleus at the center of an atom? magnetrons protons electrons neutrons
Answer
Brief Explanations:
At the center of an atom is the nucleus. Protons, which are positively - charged, and neutrons, which are neutral, are tightly packed in the nucleus. Electrons orbit the nucleus, and magnetrons are not sub - atomic particles in the nucleus.
Answer:
B. protons, D. neutrons