The Point of Today: Learn about Polyatomic Ions. At the end of today you will be able to: 1. Make compounds using Polyatomic Ions. 2. Name compounds that.

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Presentation transcript:

The Point of Today: Learn about Polyatomic Ions. At the end of today you will be able to: 1. Make compounds using Polyatomic Ions. 2. Name compounds that contain Polyatomic Ions.

Poly = Many Atom = Small things Ion = Charged SO 4 -2 Negative NH 4 +1 Positive

Refer to the chart on the back of the Periodic Table

Binary IonicPolyatomicN -3 Nitride NO 3 -1 Nitrate Vs. P -3 Phosphide PO 4 -3 Phosphate Vs. S -2 Sulfide SO 4 -2 Sulfate Vs.

Ammonium Nitrate +1-1 NH 4 NO 3 Ammonium Nitrate NH 4 NO 3

Potassium Phosphate +1-3 K PO 4 Potassium Phosphate K 3 PO 4

Sodium Nitrate +1-1 Na NO 3 Sodium Nitrate NaNO 3

Barium Nitrate +2-1 Ba NO 3 Barium Nitrate BaNO oxygen atoms? Ba(NO 3 ) 2 2 Nitrate Ions

Aluminum Sulfate +3-2 Al SO 4 Aluminum Sulfate Al 2 (SO 4 ) 3 3 Sulfates

Ammonium Nitrogen +1-3 NH 4 N Ammonium Nitride (NH 4 ) 3 N

Ammonium Sulfate +1-2 NH 4 SO 4 Ammonium Sulfate (NH 4 ) 2 SO 4 Record this as #1 on the “Polyatomic Cut-Out” Sheet

1. Sulfate SO 4 -2 Ammonium NH 4 +1 Ammonium NH 4 +1 Ratios of the charges

Chromium (III) Sulfate +3-2 Cr SO 4 Chromium (III) Sulfate Cr 2 (SO 4 ) 3 Record this as #6 on the “Polyatomic Cut-Out” Sheet

6. Sulfate SO 4 -2 Sulfate SO 4 -2 Sulfate SO 4 -2 Chromium (III) Cr +3 Chromium (III) Cr +3 Ratio of the Charges

1. Polyatomic Cut-Outs 2. “Criss-Cross Formula Writing” Homework

The Point of Today: Learn about Polyatomic Ions. At the end of today you will be able to: 1. Make compounds using Polyatomic Ions. 2. Name compounds that contain Polyatomic Ions.