Which of the following is not a rule for assigning oxidation numbers?
A. For a polyatomic ion, the sum of the oxidation numbers must equal 0.
B.The oxidation number of hydrogen in most compounds is +1.
C.The oxidation number of an atom in uncombined form is 0.
D.For neutral compounds, the sum of the oxidation numbers of the atoms must equal 0.

Thanks!

Question

Which of the following is not a rule for assigning oxidation numbers?
A. For a polyatomic ion, the sum of the oxidation numbers must equal 0.
B.The oxidation number of hydrogen in most compounds is +1.
C.The oxidation number of an atom in uncombined form is 0.
D.For neutral compounds, the sum of the oxidation numbers of the atoms must equal 0.

Thanks!

cuanchi · Answer

which one do you think and why?