1.

How is nuclear energy generated? State the main advantages and hazards of nuclear energy

Answer»

When a heavy nucleus of an unstable atom like uranium -235 breaks up an bombardment with low energy neutrons into smaller atoms. It emits a, p and y radiations with large amount of energy. This process is called nuclear fission.
Advantages:

1. It is used to generate electricity.

2. It is used to treat diseases like cancer.

3. The fuel once filled can be used for a long time.

Disadvantages: It causes health hazards due to emission of harmful radiations like a, p and y radiations,

1. safe disposable of nuclear wastes is a big handicap.



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