Compare nuclear fission with nuclear fusion.

Explanation

**Step-by-Step Solution:**

1. **Definition of Nuclear Fission:**
- Nuclear fission is a process in which a large atomic nucleus splits into two or more smaller nuclei, along with the release of energy. This process often involves the absorption of a neutron by the large nucleus, which makes it unstable and causes it to break apart.

2. **Example of Nuclear Fission:**
- A common example of nuclear fission is the splitting of Uranium-235. When it absorbs a neutron, it can split into smaller nuclei such as Barium and Krypton, along with additional neutrons and a significant amount of energy.

...