Warm up
10-12-15
1. Covalent bonds are between _____ and _____
elements
2. Ionic bonds are between _____ and _____
elements
3. Identify if these compounds are ionic or
covalent: FeS, CO2, Cl2 and AlBr3
Formulas and Names
of Ionic and Covalent
Compounds
Chp 5-3 and 6-2
Nomenclature:
Naming of compounds
• Must determine which type of bond made up
the compound
- Ionic bond has metal elements
- Covalent bond has no metal elements
Naming
Covalent (Molecular) Compounds
1. Use a prefix to indicate the amount of each
element in the compound
2. Never use mono– on the first element
name.
3. Give the last element an –ide ending.
Naming Covalent (Molecular)
Compounds
• Mono– 1
•
•
•
•
•
•
•
•
•
Di– 2
Tri– 3
Tetra– 4
Penta– 5
Hexa– 6
Hepta– 7
Octa– 8
Nona– 9
Deca– 10
Prefixes
Examples
• CO2
• B2H4
• Dinitrogen trioxide
Naming Covalent Compounds
Practice
Chemical Formula
Name
1. CO
2. P2S5
3. SiO2
4. SCl4
5.
Trinitrogen pentabromide
6.
Dinitrogen trioxide
Why incorrect? Monosulfur dioxide
Naming Ionic Compounds
1. Ending element change to –ide. (no prefixes)
2. Make sure all the charge cancel each other out
3. If there is a transition metal you indicate the
charge with a roman numeral after the name of
the metal.
4. If it is a polyatomic ion, you simply use the
name as it is. (no –ide)
Examples
1.
2.
3.
4.
5.
6.
CaCl2
MgI2
Potassium Sulfide
Beryllium Fluoride
Iron (II) Nitride
FeCl2
Naming Ionic Compounds
Practice
1.
2.
3.
4.
5.
6.
7.
______________
______________
Lithium Bromide
Calcium Fluoride
Aluminum Oxide
____________
Iron (III) Phosphide
AlCl3
Na2S
_____
_____
_____
CuCl2
____
Writing Chemical
Formula for
Ionic Compounds
-Write the symbol
and charge
-Cation goes in front
-Make sure all the charges
Cancel each other out
Transition
metal
Naming Ionic Compounds
- Polyatomic Ions
(NH4)+ Ammonium
(OH)- Hydroxide
(CO3)-2 Carbonate
(NO3)- Nitrate
(SO4)-2 Sulfate
(PO4 )-3 Phosphate
(Cr2O7)-2 Dichromate
(NH3)
Ammonia
(NO2)- Nitrite
(SO3)-2 Sulfite
(PO3)-3 Phosphite
Naming Polyatomic Ions
1.
2.
3.
4.
5.
6.
7.
8.
______________
Li2SO4
______________
Sr(NO3)2
Potassium Phosphate _____
Ammonium Oxide _____
______________
NaOH
______________
Ca(NO2)2
Calcium Carbonate ______
Ammonium Sulfide _____
More Examples
• Mixture of covalent, ionic and polyatomic
nomenclature.
SrS
Strontium Sulfide
GaCl3
Gallium Chloride
Calcium Oxide
CaO
Sulfate
SO42-
Phosphate
PO43-
Strontium Nitride
Sr3N2
Li3N
Lithium Nitride
Hydroxide
OH-
Beryllium Carbonate
BeCO3
BeSe
Beryllium Selenide
Mg(NO3)2
Magnesium Nitrate
KBr
Potassium Bromide
AlPO4
Aluminum Phosphate
Magnesium Arsenide
Mg3As2
NaOH
Sodium Hydroxide
Potassium Sulfate
K2SO4
Ba2P3
Barium Phosphide
Rubidium Phosphide
Rb3P
Potassium Chloride
KCl
Sodium Oxide
Na2O
Rb2O
Rubidium Oxide