sir can you please explain me briefly about nuclear fission and fussion...

Asked by Megha | 16th Sep, 2014, 01:34: PM

Expert Answer:

Nuclear fusion:

In nuclear fusion reactions, two light nuclei are combined to form a heavier and a more stable nucleus. When nuclear fusion occurs, large amount of energy is released.

The example of nuclear reaction is the reaction which takes place in the Sun.

 
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We can see that the element formed has more protons or more neutrons than that of the starting material. 

Nuclear fission:

It is the reverse process. In fission reactions, a heavy nucleus is split into two nuclei with smaller mass numbers when bombarded with low energy neutrons. A tremendous amount of energy is produced in this process. So, there is a small loss in the mass in form of tremendous amount of energy.

Nuclear power plants rely on fission to create vast quantities of energy. For example, U-235 nuclides can be bombarded with neutrons, and the result is lots of energy, three neutrons, and two stable nuclei (Kr-92 and Ba-141). 
 

The three neutrons formed can collide with other U-235 atoms, setting off a chain reaction and releasing tons of energy. 

Answered by Yashvanti Jain | 8th Dec, 2017, 06:00: PM