Question

Oxidation number of O in k20

Answer 1

Hence, oxidation number of Potassium in K2O is +1

Answer 2

Answer:

So, the total charge of potassium ions is +1(2)=+2, while oxygen ions is −2(7)=−14. Let x be the oxidation number of two chromiums. So, two chromium atoms have an oxidation number of +12. So one chromium atom will have an oxidation number of +12 /2=+6.