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iupac name for NA2CR2O7 AS Iron(II) oxide
The IUPAC name for Na2Cr2O7 is sodium dichromate. This compound contains sodium ions (Na+) and dichromate ions (Cr2O72-). The oxidation states of the elements in sodium dichromate are +1 for sodium and +6 for chromium. The discussion concluded with the user confirming they received the correct information from a contributor named janhaa.
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http://en.wikipedia.org/wiki/Sodium_dichromateFNN said:iupac name for NA2CR2O7 AS Iron(II) oxide