Type the oxidation number of the element in bold type.
Remember to include a sign (+ or -) with every number.

1. MgSO₄

   
   
   Check

2. NaCl

   
   
   Check

3. ZnO

   
   
   Check

4. Cu₂O

   
   
   Check

5. Cu(NO₃)₂

   
   
   Check

6. NO₃^-

   
   
   Check

7. HOCl

   
   
   Check

8. BaO₂ (barium peroxide)

   
   
   Check

9. NO₂

   
   
   Check

10. NO₂

    
    
    Check

11. NH₃

    
    
    Check

12. H₂

    
    
    Check

13. [FeSCN]^-

    
    
    Check

14. KIO₃

    
    
    Check

15. MnO₄^2-

    
    
    Check

16. CrO₄^2-

    
    
    Check

17. MnCl₂

    
    
    Check

18. MnO₂

    
    
    Check

19. Cr₂O₃

    
    
    Check

20. P₄

    
    
    Check

21. KMnO₄

    
    
    Check

22. BrO₃^- (bromate)

    
    
    Check

23. PbO₂

    
    
    Check

24. PbO

    
    
    Check

25. [Al(OH)₄]^-

    
    
    Check