Applied Physics & Chemistry(AMT 1207)
Finals Lecture Module 7:
Writing Chemical Formulas & Naming of Compounds
Weeks 16 to 17
Engr. M. Javier-Tala, MSEE
Writing Chemical Formulas and Naming of Compounds
Course Learning
Outcomes
• CLO 3. Explain the
concepts of
chemistry
associated with the
practice of aircraft
maintenance
technicians.
2
Module Learning
Outcomes
• MLO1. Define ionic
bonds and describe how
ionic bonds form.
• MLO2. Differentiate
between binary and
tertiary ionic compounds.
• MLO3. Write chemical
formulas for binary and
tertiary ionic compounds
• MLO4. Name binary and
ternary ionic compounds
using IUPAC
nomenclature
Topic Learning
Outcomes:
• TLO 20. Write formulas
from the cations and
anions in the periodic
table of elements.
• TLO 21. Name the
compounds formed.
CHEMICAL FORMULA - indicates the number of atoms of each
element in a compound.
Na
11
11 p+
Cl
17
ions
17 p+
11 e-
Na +1
cations
Cl -1
anions
11 p+
10 e-
3
17 e-
17 p+
+ charge
more p+
than e-
- charge
more ethan p+
18 e-
Writing Chemical Formulas and Naming of Compounds
Binary
Compounds
Ternary
Compounds
Ionic
Compounds
Oxoacids
Transition
Metal Ionic
Compounds
Molecular
Compounds
Binary Acids
4
Bases
Polyatomic
Ionic
Compounds
Writing Chemical Formulas and Naming of Compounds
Writing Chemical Formulas:
Binary
• Ionic Compounds
Compounds
Cations
5
CRISS-CROSS method
(refer to your Periodic Table:
cations and anions)
Anions
Cl -1
O
Na +1
Ca +2
NaCl
Na2O
Na3N
CaCl2
CaO
Ca3N2
Al +3
AlCl3
Al2O3
AlN
-2
N
-3
Writing Chemical Formulas and Naming of Compounds
Binary
• Ionic Compounds
Compounds
Cations
Na +1
6
Naming of Compounds:
cation + anion (nonmetal), add “-ide”
Anions
Cl -1
O
NaCl
Na2O
-2
N
-3
Na3N
sodium chloride
sodium oxide
sodium nitride
Ca +2
CaCl2
CaO
Ca3N2
Al +3
AlCl3
Al2O3
AlN
Writing Chemical Formulas and Naming of Compounds
Writing Chemical Formulas:
Binary
• Transition Metal
Ionic Compounds
Compounds
Cations
7
CRISS-CROSS method
(refer to your Periodic Table:
cations and anions)
Anions
Fe +2
Cl -1
O
FeCl2
FeO
Fe3N2
Fe +3
FeCl3
Fe2O3
FeN
Hg +1
HgCl
Hg2O
Hg3N
Hg +2
HgCl2
HgO
Hg3N2
-2
N
-3
Writing Chemical Formulas and Naming of Compounds
Binary
• Transition Metal
Ionic Compounds
Compounds
STOCK
Method:
Cations
use Roman
Numerals in
parenthesis
Fe +2
Fe +3
Hg +1
Hg +2
8
Naming of Compounds:
cation + anion (nonmetal), add “-ide”
STOCK Method or CLASSICAL Method
Anions
Cl -1
O
-2
N
-3
FeCl2
FeO
iron (II) chloride
iron (II) oxide
iron (II) nitride
FeCl3
Fe2O3
FeN
Hg2O
Hg3N
HgO
Hg3N2
Fe3N2
iron (III) chloride
HgCl
mercury (I) chloride
HgCl2
mercury (II) chloride
Writing Chemical Formulas and Naming of Compounds
Binary
• Transition Metal
Ionic Compounds
Compounds
CLASSICAL
Method
:
Cations
use “-ic” or
“-ous”
Fe +2
Fe +3
Hg +1
Hg +2
9
Naming of Compounds:
cation + anion (nonmetal), add “-ide”
STOCK Method or CLASSICAL Method
Anions
Cl -1
O
-2
N
-3
FeCl2
FeO
ferrous chloride
ferrous oxide
ferrous nitride
FeCl3
Fe2O3
FeN
Hg2O
Hg3N
HgO
Hg3N2
ferric chloride
HgCl
mercurous chloride
HgCl2
mercuric chloride
Fe3N2
Writing Chemical Formulas and Naming of Compounds
Binary
• Transition Metal
Ionic Compounds
Compounds
STOCK Method:
use Roman Numerals
Cations
in parenthesis
for
those with 3 or more
oxidation states
Mn +2
10
Naming of Compounds:
cation + anion (nonmetal), add “-ide”
STOCK Method
Anions
Cl -1
MnCl2
O
-2
MnO
N
-3
Mn3N2
manganese (II) chloride
manganese (II) oxide
manganese (II) nitride
Mn +3
MnCl3
Mn2O3
MnN
Mn +4
MnCl4
Mn +7
MnCl7
MnO2
manganese (IV) oxide
Mn2O7
manganese (III) nitride
Mn3O4
Mn3N7
Writing Chemical Formulas and Naming of Compounds
Writing Chemical Formulas:
Binary
• Molecular
Compounds
Compounds
Non-metal
11
CRISS-CROSS method
(refer to your Periodic Table: oxidation states
for each element if not indicated in the cations
and anions)
Non-metal
Cl -1
O
-2
N
-3
C
+2
CCl2
CO
C3N2
C
+4
CCl4
CO2
C3N4
S
+4
SCl4
SO2
S3N4
S
+6
SCl6
SO3
SN2
Writing Chemical Formulas and Naming of Compounds
Binary
• Molecular
Compounds
Compounds
Use prefixes, then “-ide” for the last
element.
No. of atoms
Prefix
No. of atoms
Prefix
1
mono
7
hepta
di
8
octa
tri
CCl
4
9
nona
tetra
10
deca
5
penta
11
undeca
6
hexa
12
duodeca
2
3
4
12
Naming of Compounds:
(use only for the
last element)
CCl2
Writing Chemical Formulas and Naming of Compounds
Binary
• Molecular
Compounds
Compounds
Non-metal
13
Cl -1
Naming of Compounds:
Use prefixes, then “-ide” for the last
element.
Non-metal
O
-2
N
-3
CCl2
CO
C3N2
carbon dichloride
carbon monoxide
CCl4
CO2
tricarbon dinitride
C
+2
C
+4
S
+4
SCl4
SO2
S3N4
S
+6
SCl6
SO3
SN2
carbon tetrachloride
C3N4
Writing Chemical Formulas and Naming of Compounds
Binary
Compounds • Binary Acids
Writing Chemical Formulas:
Cation
Anions
H
14
+1
CRISS-CROSS method
(refer to your Periodic Table:
oxidation states for each anion)
Cl -1
F -1
HCl
HF
Naming of binary
acids:
hydrogen chloride
“-ide” for the last
element, OR
“hydro–ic” + “acid”
hydrochloric acid
I -1
HI
Ternary
Compounds
oxoacids
bases
polyatomic
ionic
compounds
Writing Chemical Formulas and Naming of Compounds
Ternary
Compounds
• oxoacids
Cation
H +1
Naming of
oxoacids:
“–ic” + “acid”
“–ous” + “acid”
16
Writing Chemical Formulas:
CRISS-CROSS method
(refer to your Periodic Table:
oxidation states for each anion group)
Anions
NO3 -1
NO2 -1
SO4 -2
SO3 -2
HNO3
HNO2
H2SO4
H2SO3
nitric acid
nitrous acid
sulfuric acid
sulfurous acid
Writing Chemical Formulas and Naming of Compounds
Ternary
Compounds
Cations
• bases
Writing Chemical Formulas:
CRISS-CROSS method
(refer to your Periodic Table:
oxidation states for each cation)
Anion
OH -1
Na
17
+1
NaOH
sodium hydroxide
Ca +2
Ca(OH)2
Al +3
Al(OH)3
Naming of bases:
metal+ “hydroxide”
Writing Chemical Formulas and Naming of Compounds
Ternary
Compounds
• Polyatomic ionic
compounds
Cations
NH4
+1
CRISS-CROSS method
(refer to your Periodic Table: oxidation states
for each cation and anion group)
Anions
SO4 -2
PO4 -3
C2H3O2 -1
(NH4)2SO4
(NH4)3PO4
NH4C2H3O2
ammonium phosphate
ammonium acetate
ammonium sulfate
Naming of
polyatomic ionic compounds:
names of the cation + anion
18
Writing Chemical Formulas:
Now, do Exercises Nos. 10 & 11
(to be uploaded after our class).
Don’t forget to put your signature over printed name
in the HONESTY CLAUSE
Bring your calculator and Periodic Table of Elements
on the FINAL EXAMS.
19
Always introduce your name and section when you contact your lecturers in any media.
Any questions?
Javier Tala (private account)
donmaeva1230@gmail.com
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