Name: Date: Oxidation Numbers Assign oxidation numbers to each atom in the following compounds or ions: 1. HF 2. H2O 3. PI3 4. CS2 5. Na2O2 6. H2CO3 7. NO28. SO429. Fe3O4 Name each of the following binary molecular compounds according to the Stock System: 10. SO3 11. As2S3 12. NCl3