Arrange oxyanions of chlorine in decreasing order of stability.

Explanation

To arrange the oxyanions of chlorine in decreasing order of stability, we will analyze the oxidation states of chlorine in each oxyanion.

### Step-by-Step Solution:

1. **Identify the Oxyanions of Chlorine**:
The oxyanions of chlorine we need to consider are:
- ClO₄⁻ (Chlorate)
- ClO₃⁻ (Chlorite)
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