Polyatomic ions.

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Polyatomic ions & Naming ionic Compounds

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Presentation transcript:

Polyatomic ions

Bell Work - 10/5/16 Write the formula and name the following Ionic Compounds: Lithium + Bromine Calcium + Oxygen Cesium + Iodine Gold (II) + Oxygen Today we will be discussing polyatomic ions. What do you think a polyatomic ion is?

Polyatomic Ions Polyatomic Ions are a group of atoms bonded together that act as a unit. They have a charge, and they stay together during reactions. See your reference table for a list of Polyatomic ions. The name of the Polyatomic ion doesn’t change in the compound name. When creating bonds, put the Polyatomic ion in parentheses!! Ex. Calcium + Hydroxide Ca2+ + OH- → Ca(OH)2

Polyatomic Ion Practice Write the formula for the following compounds: Magnesium + Hydroxide Aluminum + Sulfate Copper (II) + Chlorate Potassium Permanganate Mg(OH)2 Al2(SO4)3 Cu(ClO3)2 KMnO4