It is often difficult to store radioactive isotopes of Kr and Xe. Suggest a method to store them.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Problem:**
- Radioactive isotopes of Krypton (Kr) and Xenon (Xe) are produced during nuclear reactions.
- These isotopes are challenging to store due to their radioactive nature and gaseous state.

2. **Identifying Storage Challenges:**
- The main challenges in storing these isotopes include their volatility, radioactivity, and the need for containment to prevent exposure to radiation.
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