Students will be given the formula for a cation or anion on a slip of paper or index card. He or she will find another student with an ion with the opposite charge and practice writing the formula and naming the ionic compound that would result by combining the cation and anion. Students also answer a few questions about naming and formulas of binary molecular compounds with their partner.
- Become better acquainted with their classmates and get used to working in groups.
- Construct formulas for ionic compounds based on ion charges.
- Practice naming ionic and molecular compounds based on their formulas.
The instructor will need scissor and/or index cards to prepare the slips of paper or cards with ion names on them.
I typically give cations to one half of the room and anions to the other half. This means that students must move around the room to find a suitable partner. Since this is early in the semester, this helps with getting students to talk and work with people in the class they may not know.