Can you please explain the difference between nuclear fission and fusion?
Sure thing!

In nuclear fission, the nucleus of an atom splits into two or more smaller nuclei. Whereas, in nuclear fusion two or more nuclei fuse together to produce one or more new nuclei.

The binding energies of the nuclei involved determine whether fusion or fission is possible, or likely.
What kind of element are the typical material in fission and fusion reactions typically?
In nuclear fission, the typical materials used are heavy elements such as uranium or plutonium. On the other hand, in nuclear fusion, the materials used are typically light elements such as hydrogen or helium. The fusion process occurs in stars, where hydrogen is converted into helium through a series of fusion reactions.