In nuclear fission, the number of neutrons in the resulting nuclei is not necessarily greater than the number of protons. The number of neutrons and protons in the resulting nuclei depends on the specific isotopes involved and the particular fission reaction that takes place.
During nuclear fission, a heavy nucleus, such as uranium-235 or plutonium-239, absorbs a neutron and becomes unstable. The nucleus then splits into two smaller fragments, releasing a significant amount of energy in the process. These smaller fragments are generally referred to as fission products.
The fission products can vary widely depending on the specific isotopes involved in the fission reaction. They can include a range of elements with different numbers of neutrons and protons. The resulting nuclei may have a roughly equal number of neutrons and protons, or they may have a greater number of neutrons or protons depending on the specific isotopes and the conditions of the fission reaction.
It's important to note that the number of neutrons released during fission plays a crucial role in sustaining a chain reaction. In certain nuclear reactors or weapons, a critical condition is maintained where each fission event produces, on average, more than one neutron that goes on to cause subsequent fission reactions. This allows the chain reaction to continue and sustain a release of energy.