Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

How do you assign oxidation numbers to every atom in SrCr2O7?

can you help through this problem and tell me how to find oxidation numbers for atoms?

2 Answers

Relevance
  • 1 decade ago
    Favorite Answer

    Oxygen is always -2

    H is generally +1

    column 1 is +1

    column 2 is +2

    column 3 is +3

    column 17 is -1

    column 16 is generally -2

    column 15 is generally -3

    transition elements vary

    nonmetals can vary

    Sr would be +2

    O is -2

    there are 7 O , so -14

    compounds do not have a charge

    -14, +2 gives -12 to share between 2 Cr, each at -6

  • 1 decade ago

    Sr is in the Mg group and is +2 , oxygen has to be -2 thus Cr207 is -2 and since oxygen is -2 Cr2 has to be +12 and thus Cr is +6

Still have questions? Get your answers by asking now.