Now let's take a look at the halogen Oxy anions. So these are polyatomic ions which still contain oxygen but now are containing halogens. Remember, your halogens are the elements that are in Group 7A or group 17 of the periodic table. They're referred to as also Oxy halogens, besides being called your halogen oxyanions.
Now some key things to keep in mind when dealing with these types of polyatomic ions. First of all, they're basining. The base name is just the beginning of the non metals name that is unchanged. The nonmetal here we're talking about is the halogen. The number of oxygens in these polyatomic ions affect either the prefix, which is the beginning of the name, and Oregon suffix, which is the end of the name.
We're going to say here. All the halogen oxy anions possess a -1 charge, So that's what they all have in common. So let's take a look at our halogens. We have fluorine, chlorine, bromine and iodine. The base name is just the beginning of their names. Fluorine would be fluor for its base name. Chlorine would be core for its base name. Brom would be Brom, Bromine would be Brom for its base name.
Now to this base name we can add an ending, which we'll talk about next. Iodine is just IoD as its base name. Now we said that the number of oxygens can affect both the beginning and Oregon end of the name. If it has four oxygens, it uses the base name of PER and the suffix ending of eight. So let's say we're looking at, let's talk about bromine. So bromine branch has four oxygens. They all possess a -1 charge. So the name of this would be PER. Insert the base name in the middle per bromate.
If they have 3, two and one oxygens, we're going to see how the name changes O here. Let's say we have ClO3-, O here, the beginning of the name. The prefix drops per no longer exist, but the ending of eight is still around. Because we're using chlorine, we use the base name of Chlor, so this would be chlorate. Next, let's look at IO2-. So this would be iodine ending changes from 8:00 to 8:00 as you can see.
And then let's say we have FO1-, so that would be Hypo for the beginning of the name, the prefix and then floorite. So just see when we have 4 oxygens we have the prefix of per. When we have one oxygen we have the prefix of hypo. When we have 3 or 4 oxygens we have the ending of eight. But once we drop down to two and one, the ending changes to. So these are things that you need to keep in mind when naming these different types of polyatomic ions, or in this case your Oxi halogens or your halogen oxyanions.
OK, so the number of oxygens determined the beginning and end of the name. Also, the type of halogen you use determines the base name.