The oxidation number of cr in cr2o7 2 is July 8, 2019 16 32 64 128 The oxidation number of cr in cr2o7 2 − is What is the oxidation number of cr in cr2o7 2 ion What is the oxidation number of cr in a dichromate cr2o7 2 anion What is the oxidation number of cr in this compound cr2o7 2 Cr2o72- oxidation number The oxidation number of cr in cr2o72– is quizlet