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The sum of oxidation numbers for all elements in a compound is zero.
Compounds containing metal elements with more than one oxidation number use Roman numerals.
Cu₂O is named copper(II) oxide.
Sulfuric acid has an oxidation number of +4.
Potassium manganate has an oxidation number of +7.
A positive E° value means the element is likely to be oxidized.
Metals with more negative E° values are more electropositive.
Cl₂ can oxidize Br⁻ in solution.
The color of potassium manganate in solution is purple.
Halide ions are reducing agents in redox reactions.
The oxidizing strength of halogens increases down Group 17.
H₂SO₃ is named sulfuric(IV) acid.
Iodide ions (I⁻) can reduce bromine ions (Br₂) in solution.
Sodium chlorate(I) is named NaOCl.
Nitric acid(V) has the formula HNO₃.
Zn²⁺ is the ion that is oxidized in the reaction with Cu²⁺.