Nuclear fission is not possible in laboratory. Why?

Explanation

**Step-by-Step Solution:**

1. **Understanding Nuclear Fission:**
- Nuclear fission is the process in which a heavy nucleus splits into two or more smaller nuclei, along with the release of energy. This process typically involves heavy elements like Uranium-235 or Plutonium-239.

2. **Conditions Required for Nuclear Fission:**
- For nuclear fission to occur, certain conditions must be met. One of the primary conditions is the requirement of extremely high temperatures, typically in the range of \(10^6\) to \(10^7\) Kelvin.

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