Which particle inside an atom carries no electric charge at all?

1. An atom holds three kinds of smaller particle: protons, neutrons and electrons. 2. Protons carry a positive charge and electrons carry a negative charge. 3. Neutrons are neither positive nor negative, so they are described as neutral. 4. The nucleus is a place inside the atom, not a particle on its own. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Neutrons_