CBSE Class 10 Answered
Nuclear fission |
Nuclear fusion |
In fission reactions, a heavy nucleus is split into two nuclei with smaller mass numbers. |
In fusion reactions, two light nuclei are combined to form a heavier, more stable nucleus. |
High-speed neutrons are required in nuclear fission reactions. |
Very high temperature is required for nuclear fusion reactions |
The amount of energy required to split two atoms in a fission reaction is less as compared to fusion reaction. |
A tremendous large amount of energy is required to bring two or more protons close enough to overcome their electrostatic force of repulsion. |
Tremendous large amount of energy is released by fission reactions; but lower than the energy released by nuclear fusion. |
The energy released by fusion reactions is three to four times greater than the energy released by fission reaction. |
The energy produced by nuclear fission reactions is used in nuclear power plans for generation of electricity. |
The energy produced by fusion reaction is not controlled as far and cannot be used for generation of electricity. It is used in Sun through which energy is created. |