Question

what is the job of the neutron?
to keep the electrons and protons together in the atom
none of these
to prevent the negative electrons from being pulled toward the positively charged protons
to keep the positively charged protons in the nucleus from repelling each other

Explanation:

Neutrons are neutral - charged particles in the nucleus. Protons in the nucleus have positive charge and would repel each other due to electrostatic force. Neutrons help to overcome this repulsion by providing strong - nuclear force attraction, which holds the nucleus together.

Answer:

To keep the positively charged protons in the nucleus from repelling each other