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Understanding Oxidation Numbers Quiz

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1. What is the oxidation number of a pure element in its natural state?

2. What is the oxidation number of oxygen in most compounds?

3. What is the oxidation number of hydrogen in most compounds?

4. In a neutral molecule, what is the sum of the oxidation numbers of all atoms?

5. In an ion, what is the sum of the oxidation numbers of all atoms?

6. What is the oxidation number of Fluorine in compounds?

7. In the compound KCl, what is the oxidation number of Chlorine?

8. What term is used to describe the process by which an atom loses electrons and its oxidation number increases?

9. What term is used to describe the process by which an atom gains electrons and its oxidation number decreases?

10. What is the oxidation number of nitrogen in the compound NO2?