Ionic Formula Writing and Naming - Ternary
The process for writing formulas with polyatomic compounds is similar to the process for writing formulas for binary compounds. You can still use the crossover method to balance the formula. In this activity, click on the PREV and NEXT buttons to examine how to write and name ternary ionic formulas.
View a printable version of this interactivity.
Common Polyatomic Ions
Your job in naming and writing formulas will be much easier if you can recognize the polyatomic ions listed below. Although there are hundreds of different polyatomic ions, it is very helpful to remember these ions.
| Name of Ion | Formula |
|---|---|
| Carbonate | CO3-2 |
| Sulfate | SO4-2 |
| Nitrate | NO3-1 |
| Hydroxide | OH-1 |
| Phosphate | PO4-3 |
| Ammonium | NH4+1 |
Writing and Naming Ternary Ionic Formulas Review
Now that you have explored ternary ionic formula writing and naming, review your knowledge in this non-graded activity. Drag the formulas or names on the right and drop them next to the correct ions on the left. Then, click SUBMIT to check your responses. Click on the interactivity thumbnail, and then click NEXT to get started.