Question

Oxidation number of astatine in As3O5?

Answer 1

So, here, the net charge on the whole compound is 0.

Therefore, if we take oxidation number of astatine as x here,

3x+(-5)2=0

3x-10=0

3x=10

x=10/3=3.33

So, the oxidation number of astatine is +3.33