Ch. 15 and 6 Polyatomic Ions. Polyatomic Ions . Tightly bound groups of atoms that behave as a unit and carry a charge. Examples:. Ammonium NH 4 +. Cyanide CN -. Sulfite SO 3 2-. Common Polyatomic Ions with a -1 charge. ClO -1 hypochlorite ClO 2 -1 chlorite
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Tightly bound groups of atoms that behave as a unit and carry a charge.
Trick to remember:
The bigger number ate the little number!
A. Contain a polyatomic ion
B. Same rules as for binary ionic compounds.
One addition – Use parenthesis if there is more than one polyatomic ion
Write formulas for the following ternary ionic compounds:
Tin (II) phosphate