Students occasionally have difficulty understanding how positive and negative ions join together to form neutral compounds. This is especially true when polyatomic ions are involved.
With this activity, students determine how ions in an “ion soup” can be bonded together to form neutral compounds. Students must therefore first identify the charge on each ion, and then determine how the ions might join to form neutral compounds.
Target level: 8th through 10th grade.
Time: 30 minutes.
This activity has been used in the classroom on multiple occasions.