<p>yes- heres a good list- the top are the most common so you should really just know those and youll be fine</p>
<p>[Polyatomic</a> Ions](<a href=“http://home.earthlink.net/~ssbeaton/addlinfo/polyions.html]Polyatomic”>http://home.earthlink.net/~ssbeaton/addlinfo/polyions.html)</p>