* Randomness: Nuclear fission is a random process. When a neutron strikes a uranium-235 nucleus, it doesn't always split in the same way.
* Variety of Products: There are many different possible fission products, depending on how the nucleus splits. The most common fission products are isotopes of elements in the middle of the periodic table, like barium, krypton, strontium, xenon, and cesium.
* Energy Release: The energy released during fission is also variable, depending on the specific products formed.
Example:
One possible fission reaction of uranium-235 is:
```
¹⁴¹Ba + ⁹²Kr + 3¹n → ²³⁵U + ¹n
```
But there are hundreds of other possible fission reactions, each producing different combinations of daughter nuclei.
Key takeaway: While uranium-235 always splits into two daughter nuclei and a few neutrons, the specific daughter nuclei vary each time.
