1. Memorize me

2. there is no substitute for hard
work.

3. FIRST COLUMN
All +1

4. 2nd COLUMN
All +2

5. Halogens
All -1

6. oxygen
-2

7. sulfide
S -2

8. sulfite
SO3 -2

9. sulfate
SO4 -2

10. nitrate
NO3 -1

11. nitrite
NO2 -1

12. chlorate
ClO3 -1

13. chlorite
ClO2 -1

14. hypochlorite
ClO -1

15. Fe
+2 OR +3
Ferrous or Ferric

16. Cu
+1 or +2
Cuprous or cupric

17. Cr
+2 OR +3
Chromous or chromic

18. Pb
+2 OR +4
Plumbous or plumbic

19. Tin
+2 OR +4
Stannous or stannic

20. iron
+2 OR +3
Ferrous or Ferric

21. copper
+2 OR +1
cupric or cuprous

22. nitrate
NO3 -1

23. sulfate
SO4 -2

24. acetate
C2H3O2 -1

25. hydroxide
OH -1

26. bicarbonate
HCO3 -1

27. phosphate
PO4 -3

28. aluminum
Al +3

29. Fe
+2 OR +3
Ferrous or Ferric

30. zinc
+2 Zn

31. ammonium
NH4 +1

32. Fe
+2 OR +3
Ferrous or Ferric

33. Co
+2 cobalt

34. Group 1
All +1

35. Group 2
+2

36. halogens
-1

37. Chromium
+2 OR +3
Chromous or chromic

38. Fe
+2 OR +3
Ferrous or Ferric

39. Fe
+2 OR +3
Ferrous or Ferric