Atoms and reactions

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Question 1
Easy

What is the oxidation number of Cr\text{Cr}Cr in K2Cr2O7\text{K}_2\text{Cr}_2\text{O}_7K2​Cr2​O7​?

+3+3+3

+4+4+4

+5+5+5

+6+6+6

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions