Technetium oxidation states are between -1 and +7; the most usual valences are +3, +4 and +7.
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Technetium can have oxidation states ranging from -3 to +7. However, the most common and stable oxidation state for technetium is +7.
When technetium reacts with water, it forms various technetium oxides and hydroxides depending on the reaction conditions. Technetium might exist in different oxidation states in these compounds, such as +4, +5, +6, or +7. The exact products and their properties can vary based on factors like temperature, pressure, and the presence of other chemical species in the reaction mixture.
The oxidation state of oxygen in H2O2 (hydrogen peroxide) is -1. Each hydrogen atom has an oxidation state of +1, so the total oxidation state must add up to zero in a neutral molecule.
S = +4 oxidation state O = -2 oxidation state
The oxidation state is +3.
The oxidation state of F in HOF (hydrogen monofluoride) is -1. Hydrogen is typically assigned an oxidation state of +1, leaving the fluorine with an oxidation state of -1.