What is fission and fusion, Physics

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What is Fission and Fusion?

Fission: The breaking down of a Nucleus (not atom) into minute nuclei. It is usually induced by a neutron. For instance, a Helium nucleus (known as alpha particle) is separated into two 4He(+2) --> 2H(+1) + 2H(+1).

A lot of enery is released in the process.

Fusion: This occurs when two nuclei combines to form a larger nuclei. Large amount of enery is required to start this. Because its not simple to bring two positively charged nuclei closer.

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