Problem: Classify each of the following substances by the oxidation number of hydrogen. Drag each item to the appropriate bin.Hydrogen has three possible oxidation numbers:• − 1 when bonded to a metal,• 0 when in elemental form, H2, and• +1 when bonded to a nonmetal.Oxygen has several possible oxidation numbers:• −2 when bonded to a nonmetal (other than fluorine) or as the oxide ion, O2−,• −1 as the peroxide ion, O22−,• −1/2 as the superoxide ion, O2−, and• 0 when in elemental form, O2 or O3.

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Classify each of the following substances by the oxidation number of hydrogen. 

Drag each item to the appropriate bin.



Hydrogen has three possible oxidation numbers:

• − 1 when bonded to a metal,
• 0 when in elemental form, H2, and
• +1 when bonded to a nonmetal.

Oxygen has several possible oxidation numbers:

• −2 when bonded to a nonmetal (other than fluorine) or as the oxide ion, O2−,
• −1 as the peroxide ion, O22−,
• −1/2 as the superoxide ion, O2, and
• 0 when in elemental form, O2 or O3.


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