Homework Help: chemistry

Posted by Rapinder S. on Saturday, May 24, 2008 at 6:51pm.

The oxidation number of chromium (Cr) in the dichromate ion (Cr2O72-) is

A. +2
B. +4
C. +6
D. +7
E. -2

chemistry - Tareena, Saturday, May 24, 2008 at 7:13pm
2 as i think that would b A
chemistry - DrBob222, Sunday, May 25, 2008 at 9:03pm
http://dbhs.wvusd.k12.ca.us/webdocs/Redox/Redox-Rules.html

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