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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