With our trioxides and tetraoxides, we've determined the number of oxygens and the charges associated with them. Now let's associate these structures with names. With our trioxides, we have borate. So borate would tell us that we're dealing with boron, so that'd be B_4O_3^{3-}, carbonate, carbon, so that's the CO_3^{2-} that we discovered. Nitrate is dealing with the nitrogen, so NO_3^{-}. And then silicate must be the silicon that we have here, so SiO_3^{2-}. This is their full polyatomic ion form with the name associated with it.

Now let's look at our tetraoxides. So with our tetraoxides we have phosphate, which must be dealing with our phosphorus, so that is PO_4^{3-} and then finally sulfate, which deals with our sulfur, so SO_4^{2-}. Now these represent our most common types of polyatomic oxyanions, and it's important to remember them as trioxides and tetraoxides because from here, we can slightly change their structures and introduce ourselves to new polyatomic ions and with them, new names. So click on the next video and let's take a look at some of these situations.