Distinguish between MnO2 and CuO.
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magnesium peroxide and second one is copper oxide
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mno2 oxidation number is 2.cao oxidation number is 1. mn electric confrigation mn=[ar] 3d'5 4s'2 .
mn+2= 3d'5 4s'0.
cu= [ar] 3d'10 4s'1 .
cu= [ar] 3d'10 4s'0.
mn+2= 3d'5 4s'0.
cu= [ar] 3d'10 4s'1 .
cu= [ar] 3d'10 4s'0.
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