Question

what will be the oxidation number of the following elements are marked in compounds within first bracket?.
CuSO4(S)
HNO3(N)
MnO2(Mn)
K2Cr2O7(Cr)
Na2S2O3(S)
Cul(Cu)​

Answer 1

Answer:1=cuso4=+6

2.HNO3=+5

3.MNO2=+4

4.K2CR2O7=+6

5.NA2S2O3=+2

6.cui=+1

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