Ionic Bonding Model

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Manipulatives enable students to craft ionic compounds and write their chemical formulas. Print positive and negative ions in distinct colors. The models pictured were printed at 70% to expedite the printing process. I included blank pieces so students can create additional ions by adding the symbol and charge, or simply print the blanks and mark them with a marker. ** I created a new Iodide to prevent confusion with a lowercase l in Al and Cl. Standards NGSS Overview and Background Manipulatives enable students to craft ionic compounds and write their chemical formulas. Print positive and negative ions in distinct colors. The models pictured were printed at 70% to expedite the printing process. I included blank pieces so students can create additional ions by adding the symbol and charge, or simply print the blanks and mark them with a marker. Lesson Plan and Activity Distribute sets of pieces for each group of students. I work with students in pairs. Give students a list of ionic compounds to build. Students can download and print the PDF file included here, or create their own. Students will use the pieces to craft ionic compounds. Completed compounds should be rectangular, with no open tabs or slots. Students will write the formula for the ionic compound using symbols and adding subscripts for the number of each ion in the compound. Optional - students can take a picture of their compound and include it with their formula. Project: Ionic Bonding Objective Construct ionic compounds and write their formulas. Audience This project is designed for a 7th grade chemistry class. Preparation This project is intended to be used as part of a unit on ionic bonding. Print out the positive and negative ions in distinct colors. Use a marker to color the symbol and charge of the ions. Write the names of the ions on the back of the pieces if students will have trouble recognizing them by their symbols. Store sets of ion pieces in zip-lock bags for easy storage. Steps Distribute sets of pieces for each group of students. I work with students in pairs. Give students a list of ionic compounds to build. Students can download and print the PDF file included here, or create their own. Students will use the pieces to craft ionic compounds. Completed compounds should be rectangular, with no open tabs or slots. Students will write the formula for the ionic compound using symbols and adding subscripts for the number of each ion in the compound. Optional - students can take a picture of their compound and include it with their formula. Results This project was successfully used with two groups of 7th grade students. Do not mix in polyatomic ions until students become comfortable making balanced compounds and writing formulas.