Yes, always in its ionic oxides and usually in other compounds.
The oxidation state for oxygen in the oxide ion (O2-) is -2. Oxygen typically has an oxidation state of -2 in most of its compounds.
Oxidation state of Oxygen in:Peroxides is -1Superoxides is - 1/2
Oxygen usually has an oxidation state of -2.
The oxidation state of oxygen in the compound is -2.
In this ion the oxidation state of sulfur is 6+ and the oxidation state of each oxygen is 2-
The oxidation state of oxygen in alkaline earth metal oxides is -2. Alkaline earth metals always have a +2 oxidation state, which means oxygen has to have a -2 oxidation state to balance the charges in the compound.
-2
In most compounds oxygen will have an oxidation state of -2. The only exceptions are peroxides (-1), superoxides (-1/2), and compounds in which oxygen bonds with fluorine (+1 or +2).
The oxidation state of oxygen in the hydroxide ion (OH-) is -2.
The oxidation state of oxygen in HOF (hypofluorous acid) is +1. Oxygen typically has an oxidation state of -2 in compounds, but in this case, since fluorine is more electronegative, oxygen has an oxidation state of +1 to balance the charge of the molecule.
In carbon monoxide (CO), oxygen has an oxidation state of -2 because oxygen is more electronegative than carbon. This leads oxygen to attract the shared electrons in the CO bond, giving it a partial negative charge and an oxidation state of -2. Carbon, being less electronegative, has an oxidation state of +2 to balance the overall charge of the molecule.
For the hydrogen atoms the oxidation state is 1+, for the oxygen it is 2-