The particles that are found in the mucleus of an atom are

1. neutrons

2. electrons only

3. protons and neutrons

4. protons and electrons

the answer is protons and neutrons, we find them inside the nucleus (not mucleus) the nucleus is the center of an atom. while electrons are particles that fly around outside the nucleus.

protons are positive while neutrons do not have a charge.

Protons and neutrons are found inside the nucleus, electrons are found on the outer rings of the atom.