Write any five differences between Nuclear Fission and Nuclear Fusion.
| Nuclear Fission | Nuclear Fusion |
| Fission is the splitting of a large atom into two or more smaller ones. | Fusion is the fusing of two or more lighter atoms into a larger one. |
| Fission reaction does not normally occur in nature. | Fusion occurs in stars, such as the sun. |
| Fission produces many highly radioactive particles. | Few radioactive particles are produced by fusion reaction, but if a fission "trigger" is used, radioactive particles will result from that. |
| Critical mass of the substance and high-speed neutrons are required. | High density, high temperature environment is required. |
| Takes little energy to split two atoms in a fission reaction | Extremely high energy is required to bring two or more protons close enough that nuclear forces overcome their electrostatic repulsion. |