(i) Energy released when some changes take place in the nucleus of the atom of a substance, is called Nuclear energy.
(ii) It is used for heat generation, fuel for marine vessels.
• Advantages or Nuclear Energy:
(i) Alternative source of energy due to depletion of fossil fuels.
(ii) From a small amount of fuel, a large amount of energy is released.
• Disadvantages of Nuclear Energy:
(i) Risk of nuclear waste leakage
(ii) High cost of setting up of nuclear plant
(iii) Pollution of environment.