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Homework Help: Three Ions of Oxygen

  1. Nov 6, 2011 #1
    The Question:

    - "Oxygen forms three separate ions. What are the names and formulae of the three ions?"

    Now I am familiar with the ion "Oxide" which is the Oxygen atom with a 2- (negative two) charge, but I cannot find any information on these other two, any help would be greatly appreciated, thank you.



    Answer: Oxide (one oxygen atom, negative two charge), Superoxide (two oxygen atoms, negative one charge), Peroxide (two oxygen atoms, negative two charge)

    A thanks to both Fewmet and Ygggdrasil for their help.
    Last edited: Nov 7, 2011
  2. jcsd
  3. Nov 6, 2011 #2
    It is difficult to say anything without just giving you the answer...

    Does it help to know that the other two ions are free radicals?
  4. Nov 7, 2011 #3
    It seems I may have posted this on the wrong part of the forums, this question pertains to a practice sheet. It was stated that we could use the internet, I believe the issue for me was simply using the wrong search parameters, fortunately they brought me here. This is not an issue of a grade more so reference material. I would appreciate a straight answer but I understand if you wish for me to "figure it out".

    To what you stated regarding radicals, I have found material referring to ROS and polyatomic ions involving oxygen such as superoxide, peroxide, and hydroxyl. I am not entirely sure if this is what I am looking for as I'd imagine the question refers to ions of Oxygen not ions of molecules containing Oxygen.
  5. Nov 7, 2011 #4


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    Superoxide (O2-) and peroxide (O22-) involve only oxygen and are probably what you are looking for.
  6. Nov 7, 2011 #5
    That's what I was thinking, too.

    Dometrios: From a teacher's perspective, I suspect the point of the question is to get you to see that "ion" can mean more than one nucleus is involved.
  7. Nov 7, 2011 #6
    OK, thanks for clarifying that. So in truth the answer was right in front of me all along it was just that I misunderstood the definition of "ion". Thanks for the help, this should prove quite useful during our next test.
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