In the nucleus of an atom, you would find protons and neutrons. These two particles are located in the center of the atom, tightly bound together.
1. **Protons:** These positively charged particles are found in the nucleus of an atom. The number of protons determines the element of the atom. For example, if an atom has 6 protons, it is a carbon atom.
2. **Neutrons:** These particles have no charge and are also located in the nucleus along with protons. Neutrons help stabilize the nucleus and contribute to the atom's mass.
So, the correct answer to the question "Which particles would you find in the nucleus of an atom?" is "Protons and neutrons". Electrons, on the other hand, orbit around the nucleus in specific energy levels.