1. Naming Compounds
Chapter 6
(Chapter 9)

2. Rules for Naming Compounds
Formula begins with a metal
Formula does NOT begin with a metal
(NH4+ acts like a metal)
Only 2 elements
More than 2 elements
‘H’ in front
NO ‘H’ in front
) Metal name *
) Non metal ROOT + IDE
)Metal name *
2) Polyatomic name
) Name 1st element
) 2nd element ROOT + IDE
) Prefix needed for subscripts
(di, tri, tetra, penta, hexa, hepta, octa, nona, deca)
*These metals use a Roman Numeral after their name to indicate it’s charge
Copper (I) – Cu+1
Copper (II)- Cu+2
Mercury(I) – Hg2+2
Mercury(II) – Hg+2
Iron(II) – Fe+2
Iron (III) – Fe+3
Chromium (II) – Cr+2
Chromium(III) – Cr+3
Manganese(II) – Mn+2
Manganese(III) – Mn+3
Cobalt(II) – Co+2
Cobalt(III) – Co+3
Lead(II) – Pb+2
Lead(IV) – Pb+4
Tin(II) – Sn+2
Tin(IV) – Sn+4
Only 2 elements
More than 2 elements
Polyatomic ends with ATE
Polyatomic ends with ITE
) Write HYDRO
) 2nd element ROOT + IC
) Write ACID
Classic Names: add –OUS for lower charge/ -IC for higher charge to these roots
1) Polyatomic ROOT + IC
) Write ACID
)Polyatomic ROOT + OUS
)Write ACID
Cupr -
Mercur -
Ferr -
Chrom -
Mangan -
Cobalt -
Plumb -
Stann -

3. K2SO4
Potassium sulfate

4. CaC2O4
Calcium oxalate

5. H2SO3
Sulfurous acid

6. (NH4)2S
Ammonium sulfide

7. Magnesium hydrogen carbonate
Mg(HCO3)2
Magnesium hydrogen carbonate

8. CCl4
Carbon tetrachloride

9. Diphosphorous pentoxide
P2O5
Diphosphorous pentoxide

10. NO2
Nitrogen
dioxide

11. SF6
sulfur
hexafluoride

12. H2C2O4
Oxalic acid

13. Al(C2H3O2) 3
Aluminum
acetate

14. H3PO4
Phosphoric Acid

15. HF
Hydrofluoric Acid

16. Ba(ClO)2
Barium hypochlorite

17. LiBr
Lithium bromide

18. HClO4
Perchloric acid

19. Rb2O
Rubidium oxide

20. Sr(OH)2
Strontium hydroxide

21. Potassium permanganate
KMnO4
Potassium permanganate

22. NaCN
Sodium cyanide

23. Calcium hydrogen sulfite
Ca(HSO3)2
Calcium hydrogen sulfite

24. Ba(NO3)2
Barium nitrate

25. H3PO3
Phosphorous acid

26. Ag2CrO4
Silver chromate

27. ZnCO3
Zinc carbonate

28. SO3
Sulfur trioxide

29. BeSe
Beryllium selenide

30. AlN
Aluminum nitride

31. NH4C2H3O2
Ammonium acetate

32. Phosphorous trichloride
PCl3
Phosphorous trichloride

33. Potassium hydrogen phosphite
K2HPO3
Potassium hydrogen phosphite

34. H2SO4
Sulfuric acid

35. H2S
Hydrosulfuric acid

36. (NH4)2C2O4
Ammonium oxalate

37. HNO2
Nitrous acid

38. Al2(SO4)3
Aluminum sulfate

39. LiClO2
Lithium chlorite

40. Ag2Cr2O7
Silver dichromate

41. Hl
Hydroiodic acid

42. NaClO
Sodium hypochlorite

43. NI3
Nitrogen triodide

44. H2CrO4
Chromic acid

45. Rules for Naming Compounds
Formula begins with a metal
Formula does NOT begin with a metal
(NH4+ acts like a metal)
Only 2 elements
More than 2 elements
‘H’ in front
NO ‘H’ in front
) Metal name *
) Non metal ROOT + IDE
)Metal name *
2) Polyatomic name
) Name 1st element
) 2nd element ROOT + IDE
) Prefix needed for subscripts
(di, tri, tetra, penta, hexa, hepta, octa, nona, deca)
*These metals use a Roman Numeral after their name to indicate it’s charge
Copper (I) – Cu+1
Copper (II)- Cu+2
Mercury(I) – Hg2+2
Mercury(II) – Hg+2
Iron(II) – Fe+2
Iron (III) – Fe+3
Chromium (II) – Cr+2
Chromium(III) – Cr+3
Manganese(II) – Mn+2
Manganese(III) – Mn+3
Cobalt(II) – Co+2
Cobalt(III) – Co+3
Lead(II) – Pb+2
Lead(IV) – Pb+4
Tin(II) – Sn+2
Tin(IV) – Sn+4
Only 2 elements
More than 2 elements
Polyatomic ends with ATE
Polyatomic ends with ITE
) Write HYDRO
) 2nd element ROOT + IC
) Write ACID
Classic Names: add –OUS for lower charge/ -IC for higher charge to these roots
1) Polyatomic ROOT + IC
) Write ACID
)Polyatomic ROOT + OUS
)Write ACID
Cupr -
Mercur -
Ferr -
Chrom -
Mangan -
Cobalt -
Plumb -
Stann -

46. CuBr2
Copper(II) bromide
Cupric bromide

47. Fe(NO3)3
Iron (III) nitrate
Ferric nitrate

48. SnF2
Tin(II) fluoride
Stannous fluoride

49. PbI2
Lead(II) Iodide
Plumbous Iodide

50. Co(NO2)2
Cobalt(II) nitrite
Cobaltous nitrite

51. FeO
Iron(II) oxide
Ferrous oxide

52. Iron(III) sulfate
Fe2(SO4)3

53. Cupric oxalate
CuC2O4

54. Lead(IV) oxide
PbO2
When +4 and -2 charges are paired up, REDUCE the subscripts to ‘1’ and ‘2’