Interpretation:
‘The heavy element such as uranium undergoes fission, but light element like hydrogen and lithium undergo fusion’- should be clarified
Concept introduction:
Nuclear fusion: when two or more than two nuclei is joined together to form a bigger nuclei is called as nuclear fusion.
E.g.-Nuclear fusion occurs in the sun. That’s why sun has unlimited energy and so hot.
In nuclear fusion reaction the 4 hydrogen molecule combines to form 2 helium molecule with liberation of huge amount of energy.
The fusion reaction need more heat energy.so it occurs inside the sun .
A representative reaction is
Nuclear fission:
It is the process in which a heavy nucleolus (whose mass number greater than the 200) splits into form smaller nuclei of intermediate mass and one more neutrons.
A large atomic nuclei gets decomposed due to bombardment of some subatomic particle forming one or more than one.
A representative reaction is
To explain: The reason for the given statement
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