Okay, this might be obvious to some of you but I’m a little confused about knowing the difference between a neutral compound and a polyatomic charge ion.
I understand what must happen for a redox reaction to occur and the rules that are used to calculate oxidation numbers but looking at the letters, how do I know which are neutral and which are not?
I hope this makes sense of what I'm asking.
For example: Ca²0-² is a neutral compound due to their oxidation state=0
But how would I know CO₃²- be is a polyatomic ion without asking online?
Thank you