Q. Give Basic diffrence betwwen Fission and Fusion?

A quick way to remember the difference between fission and fusion:

Fusion Fuses: In the nuclear reaction, nuclei are actually fused together to make larger, more stable nuclei.

Fission Fizzles: Fission is the chain-reaction event which continues due to beta decay. Each radioactive isotope fizzles to become more stable.

How does the fission of uranium compare to the fusion of hydrogen? Strictly speaking, a single uranium fission event provides more energy than a single hydrogen fusion event. But, compare the number of hydrogen molecules in a kilogram of hydrogen to the number of uranium molecules in a kilogram of uranium. There are many more hydrogen nuclei than uranium nuclei. Fusion of 1 kg of hydrogen atoms releases about 20 times more energy than a kilogram of uranium nuclei.