1. Making and Naming Compounds
Chemical formulation 2
Names ---- Formulas

2. Objectives Identify the charges of some common ions
Calculate the formula from the name of a compound

3. What are the names of these compounds?
Sodium fluoride
Boron oxide
Beryllium chloride
Caesium sulphide
Potassium phosphide
NaF
B2O3
BeCl2
Cs2S
K3P

4. WITHOUT USING A PERIODIC TABLE
Put the elements into their groups
There are 2 elements from each group (not counting the transition metals)
What is the oxidation number for each atom?

5. Names to Formulae Write the formula for Potassium sulfide.
Identify the elements symbols K S
Find the ions (happy atoms /oxidation numbers) K S2-
Balance the charges K+ K S2-
Simplify by putting numbers at the bottom
Don’t write the number K2S
(if necessary) reduce numbers to their lowest ratio

6. What are the names of these compounds?
Sodium fluoride
Boron oxide
Beryllium chloride
Caesium sulphide
Potassium phosphide
NaF
B2O3
BeCl2
Cs2S
K3P

7. Put these elements into groups based on their oxidation numbers
Boron
Chlorine
Nitrogen
Lithium
Aluminium
Sulfur
Magnesium
Oxygen
Sodium
Calcium
Beryllium
Carbon
Zinc
Potassium
Silver

8. Put these elements into groups based on their oxidation numbers
Lithium, sodium and potassium (+1)
Oxygen, Sulfur (-2)
Chlorine (-1)
Beryllium, magnesium and calcium (+2)
Zinc, Silver (transition metals)
Boron and aluminium (+3)
Carbon (+4 /-4)
Nitrogen (-3)

9. Names to Formulae BeCl2 CaO K3P Mg3N2 Beryllium chloride Calcium oxide
Potassium phosphide
Magnesium nitride
Identify the elements symbols
Find the ions (oxidation numbers)
Balance the charges
Simplify by putting numbers at the bottom
(if necessary) reduce numbers to their lowest ratio
Don’t write the number 1

10. Write the names and formulas
LiF 
CaH2
magnesium nitride
beryllium chloride
Lithium flouride 
Calcium hydride
Mg3N2
BeCl2

11. Type I Binary Compounds
Type 2 Binary Compounds

12. Type II Binary Compounds
For Type II binary compounds the metal present is NOT found in either Group 1 or Group 2 on the periodic table.
These make cations that can have various oxidation numbers. We label their oxidation number by using Roman Numerals
I                 VI
II                VII
III              VIII
IV              IX
V               X
e.g.
Iron (II) chloride
Iron cation has a charge of 2+

13. Names to Formulae FeCl2 PbS2 Ni2O3 Iron (II) chloride
Lead (IV) sulphide
Nickel (III) oxide
Identify the elements symbols
Find the ions (oxidation numbers)
Balance the charges
Simplify by putting numbers at the bottom
(if necessary) reduce numbers to their lowest ratio
Don’t write the number 1

14. Type II Binary Compounds
For Type II binary compounds the naming is more difficult because you need to include the oxidation number in roman numerals.
Write the name of Fe2O3
Identify the elements and symbols Fe (iron) O (oxygen)
Find the ions (oxidation numbers) Fe? O2-
Balance the charges to get the oxidation number Fe? Fe? = O2- O2- O2-
Write the cation oxidation number in roman numerals (III)
Write the names with the number in the middle Iron (III) oxide

15. Type II Binary Compounds
Write the names of
FeO CuCl
CrO3 Pb3N4
Identify the elements and symbols
Find the ions (oxidation numbers)
Balance the charges to get the oxidation number
Write the cation oxidation number in roman numerals
Write the names with the number in the middle

16. Type II Binary Compounds
Write the names of
FeO CuCl CrO3 Pb3N4
Identify the elements and symbols
Find the ions (oxidation numbers)
Balance the charges to get the oxidation number
Write the cation oxidation number in roman numerals
Write the names with the number in the middle
Iron (II) oxide Copper (I) chloride Chromium (VI) oxide Lead (IV) nitride

17. Practice of type 1 and 2 K2O H2S Na3P Sodium oxide Calcium hydride
Beryllium nitride
Titanium(IV) oxide
Iron(III) sulphide
Cobalt(II) flouride
Co2S3
Hg3P2
CdI2
Potassium oxide
Hydrogen sulphide
Sodium phosphide
Na2O
CaH2
Be3N2
TiO2
Fe2S3
CoF2
Cobalt (III) sulfide 
Mercury (II) phosphide
Cadmium (II) iodide  

18. Practice of type 1 and 2 K2O H2S Na3P Sodium oxide Calcium hydride
Beryllium nitride
Titanium(IV) oxide
Iron(III) sulphide
Cobalt(II) flouride
Co2S3
Hg3P2
CdI2
Potassium oxide
Hydrogen sulphide
Sodium phosphide
Na2O
CaH2
Be3N2
TiO2
Fe2S3
CoF2
Cobalt (III) sulfide 
Mercury (II) phosphide
Cadmium (II) iodide  

19. Type 3 Compounds are the same as Type 2 Binary compounds
Write the formula for carbon(IV) chloride.
C Cl
C4+ Cl-
C4+ 4 x Cl- = CCl4
Name the compound N2O
Nitrogen (?) oxide
N? O2-
N? N? O2-
: N = Nitrogen (I) oxide