Asked by Rapinder S.

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

A. +2
B. +4
C. +6
D. +7
E. -2
Answered by Tareena
2 as i think that would b A
Answered by DrBob222
http://dbhs.wvusd.k12.ca.us/webdocs/Redox/Redox-Rules.html
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