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Which of the following statements best describes what occurs during nuclear fission?
The nuclei of two or more atoms come close together and are fused into a new type of atomic nucleus.
The nucleus of an unstable atom emits radiation.
Hydrogen nuclei fuse into helium.
A neutron splits an atom into two smaller nuclei, releasing high amounts of energy and other neutrons in the process.
All of the above are good descriptions of nuclear fission.