1. Naming ionic compounds
Binary ionic
2 different elements

2. Naming from the formula CaCl2
Always name the METAL first. The metal keeps its name.
Ca = Calcium (take the name right off the PT)
The NONMETAL is second. Change the ending to IDE (a new suffix)
Cl2 Chlorine to chloride (ine changes to ide)
Subscript: “2” after Cl means 2 Chlorine!
So CaCl2 = Calcium Chloride

3. Name the Nonmetal ions below (use suffixes)
Nitrogen
Oxygen
Fluorine
Phosphorus
Sulfur
Chlorine
Bromine
Iodine
Nitride
Oxide
Fluoride
Phosphide
Sulfide
Chloride
Bromide
Iodide

4. Name the ionic Compound
Na2S
SrO
Li3N
CaI2
KBr
Sodium Sulfide
Strontium Oxide
Lithium Nitride
Calcium Iodide
Potassium Bromide

5. Writing formulas - using Subscripts
Subscripts tell you the number of each type of ion
They are placed after the ion they refer to
You must use them to insure you have a correct chemical formula
Example:
Na3P
3 sodium ions
1 phosphorous ion

6. 1 Ca2+ 2Cl1- 1 Mg2+ 1 S2- 2 Al3+ 3 O2- 1 Ca2+ 2 Br1-
Identify the individual ions that make up the substance (include charges on ions)
CaCl2
MgS
Al2O3
CaBr2
1 Ca2+ 2Cl1-
1 Mg2+ 1 S2-
2 Al3+ 3 O2-
1 Ca2+ 2 Br1-

7. How do we determine how many of each ion?
The goal is to have a neutral compound.
Electrons lost must equal the number of electrons gained.
All elements involved must be satisfied (stable) with a full outer shell of electrons

8. Overall charge must equal Zero
Example:
Calcium and Chlorine
Write out the ions
Ca+2 and Cl-1
How many chlorine ions bond with each calcium…