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2. Learn the Criss-Cross Method
The Point of Today: 1. Name Ionic Compounds 2. Learn the Criss-Cross Method
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Ionic Compounds are composed of a metal and a non-metal
Metals = Positive (+) Charge Non-Metals = Negative Charge (-) Ionic Compounds
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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
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Binary Ionic Compounds
Group 1A and 2A Non-Metals Binary Ionic Compounds
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Charges +4 or -4 +1 +2 +3 -3 -2 -1
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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
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Aluminum Chlorine Al Cl AlCl3 Aluminum Chloride Let's Practice!
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Lithium Nitrogen Li N Li3N Lithium Nitride Let's Practice!
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Barium Phosphorus Ba P Ba3P2 Barium Phosphide Let's Practice!
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Take out the Formula Mania Worksheet!
Try #1
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AlN Al3N3 +3 -3 Al N Aluminum Nitride Aluminum Nitrogen
Al N AlN Al3N3 Aluminum Nitride Let's Practice!
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Formula Mania Worksheet
Al +3 Aluminum N -3 Nitride Ratio of the Charges!
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1st Metals, then Non-Metals
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Formula Mania Worksheet
Lithium Li+1 N -3 Nitride Lithium Li+1 Lithium Li+1 Ratio of the Charges!
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2. Learn the Criss-Cross Method
The Point of Today: 1. Name Ionic Compounds 2. Learn the Criss-Cross Method
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Independent Practice Now that you have practiced Binary Ionic Compounds, it is time to try this on your own! Complete the “Formula Mania” worksheet!
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