| Nuclear Fission |
Nuclear Fusion |
| When a heavy nucleus like U-235 splits up into nearly two equal parts by the bombardment of slow-moving neutrons considerable amount of energy is released. |
When two or more lighter atoms of hydrogen or protons are fused into heavier atom, a large amount of energy is released. |
| The principle behind atom bomb is Nuclear fission. |
The principle behind the hydrogen bomb is nuclear fusion. |
| In this reaction, 200 MeV of energy is released per fission. |
In this reaction 25.71 MeV of energy is released. |
| Energy released per nucleon is less. |
The energy released per nucleons is more. |
| Particles involved are neutrons |
Particles involved are protons. |
| Fission takes place at room temperature. |
Fusion takes place only at very high temperature and high pressure. |
| Fission produces radioactive elements like Barium and Krypton which are harmful (radioactive) |
The products of fusion are harmless (not radioactive) |
