Why alkaline earth metal oxides are quite stable?

Explanation

**Step-by-Step Solution:**

1. **Formation of Alkaline Earth Metal Oxides**:
Alkaline earth metal oxides are formed through two primary methods:
- By heating alkaline earth metals (like beryllium, magnesium, and calcium) in the presence of dioxygen (O2).
- By the thermal decomposition of alkaline earth metal carbonates.

2. **Chemical Reactions**:
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