1. 2. Learn the Criss-Cross Method
The Point of Today:
1. Name Ionic Compounds
2. Learn the Criss-Cross Method

2. Ionic Compounds are composed of a metal and a non-metal
Metals = Positive (+) Charge
Non-Metals = Negative Charge (-)
Ionic Compounds

3. Ionic = Metal + Non-Metal
Binary Ionic = Group 1A or 2A Metal (alkali & alkaline-earth metals) and any Non- Metal
Metal name is the same, Non-Metal changes to an “ide” ending.
Use the Criss-Cross Method
Binary Ionic Compounds

4. Binary Ionic Compounds
Group 1A and 2A
Non-Metals
Binary Ionic Compounds

5. Charges
+4 or -4 +1 +2 +3 -3 -2 -1

6. Calcium Chlorine Ca Cl Calcium Chloride CaCl2 -1 Criss-Cross Method +2
Element Name +2 -1
Charge Ca Cl
Element Symbol
CaCl2
Formula
Compound Name
Calcium Chloride
Criss-Cross Method

7. Aluminum Chlorine
Al Cl
AlCl3
Aluminum Chloride
Let's Practice!

8. Lithium Nitrogen
Li N
Li3N
Lithium Nitride
Let's Practice!

9. Barium Phosphorus
Ba P
Ba3P2
Barium Phosphide
Let's Practice!

10. Take out the Formula Mania Worksheet!
Try #1

11. AlN Al3N3 +3 -3 Al N Aluminum Nitride Aluminum Nitrogen
Al N
AlN
Al3N3
Aluminum Nitride
Let's Practice!

12. Formula Mania Worksheet
Al +3
Aluminum
N -3
Nitride
Ratio of the Charges!

13. 1st Metals, then Non-Metals

14. Formula Mania Worksheet
Lithium
Li+1
N -3
Nitride
Lithium
Li+1
Lithium
Li+1
Ratio of the Charges!

15. 2. Learn the Criss-Cross Method
The Point of Today:
1. Name Ionic Compounds
2. Learn the Criss-Cross Method

16. Independent Practice
Now that you have practiced Binary Ionic Compounds, it is time to try this on your own! Complete the “Formula Mania” worksheet!