Write all the common oxidation states of halogens:

Explanation

To determine the common oxidation states of halogens, we will analyze each halogen element: fluorine, chlorine, bromine, and iodine.

### Step-by-Step Solution:

1. **Identify the Halogens**: The halogens in the periodic table include fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

2. **Oxidation States of Fluorine**:
- Fluorine is the most electronegative element and can only exhibit two oxidation states:
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