Identify the correct statement about nuclear fission.

Nuclear fission is the coming together of high-energy electrons and low-energy neutrons.

The nucleus of a heavy atom, when bombarded with low-energy neutrons, can be split apart into lighter nuclei.

The nucleus of a low-energy atom, when bombarded with high-energy neutrons, can be split apart into lighter nuclei.

The nucleus of a low-energy atom, when bombarded with high-energy neutrons, can be split apart into heavier nuclei.