Nuclear Power Engineering
The emission of an a-particle causes the resultant nucleus to have

More atomic weight and less atomic number
Less atomic weight and less atomic number
Less atomic weight and more atomic number
None of these

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Nuclear Power Engineering
Commercial power generation from fusion reactor is not yet possible, because

It is difficult to initiate fusion reaction
The fuel required (e.g. deuterium and tritium) is scarce
It is difficult to control fusion reaction
Quantity of fuel required for initiating fusion reaction is prohibitively high

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