Do not leave class today without a complete understanding of this concept. Your success during the rest of the year depends on you understanding chemical formulas. These polyatomic ions are used regularly in this class. You should become very familiar with their formulas and charges. In addition to the polyatomic ions above, you might also encounter the ions on this chart.
Ammonium is an ion, while ammonia is a molecule.
Remember the NH 3 formula for ammonia. Use this day to learn the fifteen polyatomic ions above and become familiar with the ones on the chart. Now is the time to ask for individual help from your facilitator if you have any questions about compounds and formulas. There will be a traditional test over chemical formulas tommorow . Use the skills test as a review for the formal test.