Here are the matches based on the descriptions of the elements:
-
Oxygen:
- Is the Oxidizing Agent
- Is Reduced
-
Iron:
- Is the Reducing Agent
- Is Oxidized
- Becomes more positive
- Becomes more negative
For a more concise pairing:
- Oxygen: Is the Oxidizing Agent, Is Reduced
- Iron: Is the Reducing Agent, Is Oxidized, Becomes more positive, Becomes more negative
If you have any specific context or chemical reactions in mind, please let me know!