1. (a.k.a. “Naming Chemical Compounds”)
Nomenclature
(a.k.a. “Naming Chemical Compounds”)

2. Part I: Naming Ionic Compounds

3. Steps to Naming an Ionic compound
The name of the cation (metal) goes first
Drop the suffix (last syllable) of the anion (nonmetal), and add –ide
KBr = Potassium bromide
CaO = Calcium oxide

4. Examples of Suffix Changes
hydrogen = hydride
carbon = carbide
nitrogen = nitride
oxygen = oxide
sulfur = sulfide
all halogens: -ine  -ide

5. Examples:
CaCl2
Li2O
Pt3N  How will the reader know the charge of platinum?

6. Steps to Naming an Ionic compound
Transition Metals . . .
Write a Roman numeral (ex. I, II, III, IV) with the number of the charge after the name of the metal (remember: transition metals can have more than 1)
FeF2 = Iron(II) floride
FeF3 = Iron(III) floride
HgBr2 = Mercury(II) bromide

7. *Note: you can tell the charge of a transition metal by looking at its bonding partner
AgCl
AgCl2
Ag2O

8. Part II: Naming Compounds with Polyatomic Ions
( a.k.a. “ternary” compounds =
3 elements or more)

9. 10 Polyatomic Ions to know
Matching quiz next class!
NH4+ ammonium
NO3- nitrate
SO4-2 sulfate
OH- hydroxide
PO4-3 phosphate
CO3-2 carbonate
C2H3O2- acetate
MnO4- permanganate
CrO4-2 chromate
Add this one: SCN- thiocyanate

10. Steps to Name Compounds with Polyatomic Ions
If the polyatomic ion is 1st (left)
write polyatomic ion name first
end name of second element to with –ide
NH4F = Ammonium fluoride

11. Steps to Name Compounds with Polyatomic Ions
If the polyatomic ion is 2nd (right)
write metal name first
write polyatomic ion name second
BaSO4 = barium sulfate
Ca(NO2)2 = calcium nitrite
Fe(NO3)2 = iron(II) nitrate

12. Part III: Naming Covalent Compounds
To be completed at a later date…

13. Steps to Name Covalent Compounds
Name of the element that is more LEFT on the periodic table goes on the LEFT
The name of the other element goes on the RIGHT and has -ide at the end
Greek prefixes tell how many of each atom are present (Hint: mono is only used for oxygen)

14. Greek Prefixes: CO2 = carbon dioxide P3S4 = triphosphorus tetrasulfide
*only for
oxygen
1= mono-
2 = di-
3 = tri-
4 = tetra-
5 = penta-
6 = hexa-
7 = hepta-
8 = octa-
9 = nona-
10 = deca-
Greek prefixes are used BEFORE the element name
CO2 = carbon dioxide
P3S4 = triphosphorus tetrasulfide

15. Examples:
NO =
CCl4 =
N2S5 =
H2 =