Difference Between Nuclear Fission and Fusion
| Nuclear fission | Nuclear fusion |
| The process involves the fission of the heavy nucleus to the lighter nuclei. | The process involves the fission of the lighter nuclei to heavy nucleus. |
| The process can take place at ordinary temperature. | The process takes place at higher temperature ( . |
The energy liberated during this process is high (200 MeV per fission) | The energy liberated during the process is comparatively low (3 to 24 MeV per fusion) |
| Percentage efficiency of the energy conversion is comparatively less. | Percentage efficiency of the energy conversion is high (four times to that of the fission process). |
| The process can be controlled for useful purposes. | The process cannot be controlled. |