Final answer:
The attraction of the nucleus towards the outer electrons is greater in an atom that has a greater number of protons because opposite charges attract each other.
Step-by-step explanation:
In an atom, the attraction between the nucleus and the outer electrons is greater when the atom has a greater number of protons. This is because the protons are positively charged and the electrons are negatively charged, and opposite charges attract each other. The more protons there are in the nucleus, the stronger the attraction between the nucleus and the electrons.