Explain in detail the differences & similarities between Fission & Fusion

Fusion and Fission both are nuclear reactions where the major difference between them is Fusion is combining process whereas fission is a breaking process.

Explanation:

Similarity:

Both Fission and Fusion are nuclear reactions that releases vast amount of energy.

Difference:

Fission is the splitting of heavier nucleus into lighter nuclei which generates maximum amount of energy whereas fusion is the combining 2 lighter nuclei to form a heavier nucleus and makes a vast energy. The energy generated by fission reaction in these reactors heats up the water into steam. This steam is utilized to rotate a turbine to generate carbon-free electricity.  Fusion reactions are difficult to retain for longer period of time since it needs tremendous amount of temperature and pressure to combine the nuclei together.

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

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