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One of the characteristics of nuclear reactions is that in their decayed or fused parts

1. total mall number keeps on changing
2. total charge number keeps on changing
3. total charge number remains constant
4. all the above

Correct answer: total charge number remains constant

Solution

Nuclear reactions can change the arrangement of nucleons, but they must conserve electric charge. Since charge is determined by the number of protons, the total charge number stays the same before and after the reaction.

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