which rule for assigning oxidation numbers is correct?hydrogen is usually -1.oxygen is usually -2.a pure…
which rule for assigning oxidation numbers is correct?hydrogen is usually -1.oxygen is usually -2.a pure group 1 element is +1.a monatomic ion is 0.
Answer
Brief Explanations:
- Hydrogen is usually +1, only -1 in hydrides.
- Pure elements (including group 1) have oxidation number 0.
- Monatomic ions have oxidation number equal to their charge, not 0.
- Oxygen typically has an oxidation number of -2, except in peroxides or with fluorine.
Answer:
B. Oxygen is usually –2.