Name:_______________________________________ Name:_______________________________________
Ionic Compound Builder
When you combine ions to make ionic compounds you must have an equal number of positive and
negative charges. So if you are combing Mg2+ and Cl- you need one Mg2+ and two Cl-. The formula for this
compound is MgCl2.
Polyatomic ions are combined in the same way, but are slightly more complicated. If you have Mg 2+ and NO3you need one Mg2+ and two NO3 - ions and the chemical formula is Mg(NO3)2. You must put a parenthesis
around the polyatomic ion and place a number below showing you have two NO3-ions. You only have to use
parenthesis if you have more than one polyatomic ion.
Remember: All compounds are electrically ______________________!!!
Arrange the ion cards to help you write a minimum of 35 chemical formulas. The top teams to find 50 formulas earn
Chem Cash!
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Bring answer sheet to Mrs.
Ivory
Name:_______________________________________ Name:_______________________________________
Print 20
+
Na
+
Cs
-
NO3
2+
3+
2Cu Al SO4
2+
+
Mg Na ClO3
3+
+
+
Al Cs Na
2+
+
2+
Mg Cs Cu
2+
3+
Mg ClO3 Al
2+
+
2+
Cu H Ca
Name:_______________________________________ Name:_______________________________________
+
K
+
K
2+
Sr
2+
Ca
2+
Zn
2+
Sr
2+
Sr
+
H
-
NO3
2+
+
Zn
H NO3
2SO4 OH OH
2SO4 ClO3 OH
Cl Cl Cl
Print 20
Name:_______________________________________ Name:_______________________________________
2+
Ca
2+
Zn
+
K
2+
Ca
2+
Zn
+
K
2+
Ca
2+
Zn
+
K
2+
2+
+
Ca Zn
K
2+
2+
+
Ca Zn
K
Print 5