Polyatomic Ions. Polyatomic ions:  2 or more covalently bonded atoms that act as one large ion.  Ex. NO 3 is nitrate End with –ate or –ite  You will.

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Presentation transcript:

Polyatomic Ions

Polyatomic ions:  2 or more covalently bonded atoms that act as one large ion.  Ex. NO 3 is nitrate End with –ate or –ite  You will have a chart with their names

Polyatomic Ions: Formula to Name Bond to act like ionic compounds No prefixes in the compound names Example: Magnesium sulfate is Mg(SO 4 )

You try: K 2 (PO 4 ) Mg(NO 3 ) 2 (NH 4 )Cl

Polyatomic Ions Each polyatomic ion has an oxidation number You will criss-cross to find the chemical formula for a compound

You try: sodium carbonate barium nitrate ammonium sulfate

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