Which one of the following statements is correct?
- A.The oxidation number for hydrogen is always zero.
- B.The oxidation number for hydrogen is always +1.
- C.The oxidation number for hydrogen is always -1.
- D.Hydrogen can have more than one oxidation number.
Show answer
Hydrogen shows 0, +1 or -1 depending on what it is bonded to. In the free element H2 its oxidation number is 0, as for every element in its uncombined state.
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