sentence2_structure: A neutron<>collides<>with an atom of u-235 during the basic nuclear fission process
sentence1: Electrons, protons, and neutrons are the basic types of particles found in atoms.
sentence2: A neutron collides with an atom of u-235 during the basic nuclear fission process.
question: What type of particle collides with an atom of u-235 during the basic nuclear fission process?