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  1. toby summerfieldNovember 23, 2018 at 4:12 AM

    i get rounding up or down to fill a shell and make ions but I struggle with whether to do [-1]

    or[+1]

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    Replies
    1. Miss JudgeNovember 23, 2018 at 11:17 AM

      Hi Toby,
      If you click on Videos at the top I have added in a video to show how ions are formed. I will also post a video of my own explanation later.
      Hope this helps and if you are still stuck, let us know.

      Delete
    2. Miss JudgeNovember 23, 2018 at 2:53 PM

      I have now added a video of my own explanation too.

      Delete

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