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#13 - Polyatomic IonsNow you know how to make bonds using atoms, and when these atoms have obtained electrons, or given electrons it has an electric charge. Well, there are groups of atoms that stick together as one that are ions of their own, they�re called polyatomic ions. The "poly" means many, and the "atomic" means atoms, so polyatomic means "many atoms". They also have a charge, and acts like an actual element. One example of a polyatomic ion is NO3-, which is nitrate. It has a charge of negative one. It can react with Sodium (Na) and form NaNO3- , sodium nitrate. Here�s a list of 14 common polyatomic ions:
Now there are more than just 14 polyatomic ions. There are hundreds of them. Here�s a list of other polyatomic ions that exist, but you probably wont use these until you�re in either A.P. chemistry or college chemistry.
How would you react a polyatomic ion with an element? and how would you name it? You would react a polyatomic ion like you would any atom. There�s only one difference, if there�s more than one polyatomic used, it�s put in parentheses with the subscript number at the end. For Example, if I wanted to react Aluminum(Al) with Nitrate(NO3-) I would get this: Al(NO3)3 To name a polyatomic bond is just like naming an ionic bond. just state the name of the first thing and the name of the second.
Aluminum Nitrate
Na2SO4
(NH4)3PO3 Lastly, the only way to remember these polyatomic ions is simply to remember them. It�s a very hard thing to do for some people. I even have trouble remembering them, but they�re an important part of chemistry!
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