Final answer:
Photoelectric fission is not a way that a U-235 atom could fission.
Step-by-step explanation:
The correct answer is c) Photoelectric fission. Photoelectric fission is not a way that a U-235 atom could fission. Nuclear fission can occur through spontaneous fission, induced fission by neutron absorption, and alpha particle bombardment. Spontaneous fission occurs when the nucleus of a U-235 atom breaks apart into smaller pieces without any external influence. Induced fission by neutron absorption happens when a slow neutron collides with a U-235 atom, causing it to split into two isotopes. Alpha particle bombardment involves bombarding a U-235 atom with alpha particles in order to induce fission.