Why do not helium, neon and argon form chemical compounds ?

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Elements**: The elements in question are helium (He), neon (Ne), and argon (Ar). These are classified as noble gases or inert gases.

2. **Understanding Noble Gases**: Noble gases are known for their lack of reactivity. This is primarily due to their electronic configurations, which are stable and complete.

3. **Electronic Configurations**:
- Helium has the electronic configuration of 1s².
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