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en.wikipedia.org/wiki/Oxidation_state

The oxidation state, often called the oxidation number, is an indicator of the degree of oxidation .... Oxygen is assumed to have its usual oxidation state of −2, and so the sum of the oxidation states of all the atoms can be expressed as x + 2( −2) ...

www.chemguide.co.uk/inorganic/redox/oxidnstates.html

The less electronegative one is given a positive oxidation state. Remember that fluorine is the most electronegative element with oxygen second.

www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions/a/oxidation-number

3, point, spaceIn compounds: fluorine is assigned a oxidation number; oxygen is usually assigned a oxidation number (except in peroxide compounds where it ...

www.khanacademy.org/science/chemistry/oxidation-reduction/redox-oxidation-reduction/v/practice-determining-oxidation-states

Determining oxidation numbers in magnesium oxide and magnesium ... My Chemistry teacher taught us to assume that Oxygen is 2-, and Hydrogen is 1+.

www.dummies.com/education/science/chemistry/rules-for-assigning-oxidation-numbers-to-elements

Rule 5: The oxidation number of oxygen in a compound is usually –2. If, however, the oxygen is in a class of compounds called peroxides (for example, ...

chemed.chem.purdue.edu/genchem/topicreview/bp/ch2/oxnumb.html

The oxidation number of simple ions is equal to the charge on the ion. The oxidation ... Oxygen usually has an oxidation number of -2. Exceptions include ...

www.science.uwaterloo.ca/~cchieh/cact/c123/oxidstat.html

The oxidation state of oxygen in its compounds is -2, except for peroxides like ... - 1 for halogens except when they form compounds with oxygen or one another;.

www.quora.com/What-is-the-oxidation-number-of-oxygen-in-hydrogen-peroxide-H2O2

The oxidation number of oxygen in compounds is usually -2, but it is -1 in peroxides. The sum of the oxidation numbers of all the atoms in a neutral compound is 0.

www.britannica.com/science/oxidation-number

The iron ion Fe 3+, for example, has an oxidation number of +3 because it can acquire three electrons to form a chemical bond, while the oxygen ion O 2− has ...

socratic.org/questions/what-are-the-oxidation-numbers-in-the-compound-h2o2

Dec 3, 2016 ... Since "H"_2"O"_2 has no charge, the total oxidation number of the two "O" atoms must be -2. The oxidation number of one oxygen atom must ...

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