|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)