Chemistry 1, H/G Name: Practice: Oxidation Numbers Date: Per: For each of the following, give the oxidation state of the least electronegative element. Species Formula Name Least Electronegative Element Oxidation State 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. BrO3CNOCNClOClO2ClO3ClO4HCO3HSO3HSO4IO3IO4NO2NO3MnO4VO3CO32CrO42Cr2O72HPO32HPO42MoO42C2O42O22S2O82SeO42SiO32SO32SO42S2O32C4H4O62TeO42B4O72WO42PO33PO43AsO33AsO43BO33C6H5O73Fe(CN)63- Carbon; hydrogen is usually +1* Sulfur; hydrogen is usually +1* Phosphorus; hydrogen is usually +1* Phosphorus; hydrogen is usually +1* Carbon; hydrogen is usually +1* Carbon; hydrogen is usually +1* Chemistry 1, H/G Name: Practice: Oxidation Numbers Date: Per: For each of the following, give the oxidation state of the least electronegative element. Species Formula Name Least Electro Oxidation State negative Element 1. B2H6 2. BCl3 3. Cl2O 4. Cl2O7 5. Cl2O5 6. NF3 7. NH3 N; H is usually +1 8. NO 9. NO2 10. OF2 11. P2O3 12. P2O5 13. P4O10 14. S2Cl2 15. S2O4 16. S2O6 17. SiO2 18. XeF4 For each of the following, give the oxidation state of the least electronegative element. Species Chemical Formula Least ElectroOxidation State negative Element 1. Carbon monoxide 2. Carbon dioxide 3. Carbon disulfide 4. Carbon tetrachloride 5. Dinitrogen tetrahydride N; H is usually +1 6. Dinitrogen oxide 7. Dinitrogen trioxide 8. Dinitrogen pentoxide 9. Sulfur tetrafluoride 10. Sulfur trioxide 11. Sulfur dioxide 12. Sulfur dichloride 13. Phosphorus trihydride P; H is usually +1 14. Phosphorus triiodide 15. Phosphorus pentabromide
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