Question

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

Explanation:

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