what is the oxidation number ?

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https://www.britannica.com/science/oxidation-number

https://www.britannica.com/science/oxidation-number
Oxidation number | Definition & Facts | Britannica
1 déc. 2023oxidation number, the total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom. Each atom that participates in an oxidation-reduction reaction is assigned an oxidation number that reflects its ability to acquire, donate, or share electrons.
Chemical Bonding
chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world.When atoms approach one another, their nuclei and electrons interact and tend to distribute themselves in space in such a way that the total energy is lower than it would be in any alternative …

https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Electrochemistry/Redox_Chemistry/Oxidation_States_(Oxidation_Numbers)

https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Electrochemistry/Redox_Chemistry/Oxidation_States_(Oxidation_Numbers)
Oxidation States (Oxidation Numbers) – Chemistry LibreTexts
29 août 2023The positive oxidation state is the total number of electrons removed from the elemental state. It is possible to remove a fifth electron to form another the VO+2 VO 2 + ion with the vanadium in a +5 oxidation state. Each time the vanadium is oxidized (and loses another electron), its state increases by 1.

https://chem.libretexts.org / Courses / University_of_Kentucky / UK:_CHE_103_-_Chemistry_for_Allied_Health_(Soult) / Chapters / Chapter_11:_Properties_of_Reactions / 11.1:_Oxidation_Numbers

https://chem.libretexts.org / Courses / University_of_Kentucky / UK:_CHE_103_-_Chemistry_for_Allied_Health_(Soult) / Chapters / Chapter_11:_Properties_of_Reactions / 11.1:_Oxidation_Numbers
11.1: Oxidation Numbers – Chemistry LibreTexts
The oxidation number of a monatomic (composed of one atom) ion is the same as the charge of the ion. For example, the oxidation numbers of K +, Se2 −, and Au3 + are + 1, − 2, and + 3, respectively. The oxidation number of oxygen in most compounds is − 2. The oxidation number of hydrogen in most compounds is + 1.

https://en.wikipedia.org/wiki/Oxidation_state

https://en.wikipedia.org/wiki/Oxidation_state
Oxidation state – Wikipedia
In chemistry, the oxidation state, or oxidation number, is the hypothetical charge of an atom if all of its bonds to other atoms were fully ionic. It describes the degree of oxidation (loss of electrons) of an atom in a chemical compound. Conceptually, the oxidation state may be positive, negative or zero.

https://byjus.com/jee/oxidation-number

https://byjus.com/jee/oxidation-number
Oxidation Number – Definition, Calculation, Examples, Problems …
The Oxidation Number, in simple terms, can be described as the number that is allocated to elements in a chemical combination. The oxidation number is basically the count of electrons that atoms in a molecule can share, lose or gain while forming chemical bonds with other atoms of a different element.

https://chem.libretexts.org/Courses/University_of_Florida/CHM2047:_One-Semester_General_Chemistry_(Kleiman)/05:_Molecular_Structure_and_Geometry/5.03:_Oxidation_number

https://chem.libretexts.org/Courses/University_of_Florida/CHM2047:_One-Semester_General_Chemistry_(Kleiman)/05:_Molecular_Structure_and_Geometry/5.03:_Oxidation_number
5.3: Oxidation number – Chemistry LibreTexts
Oxygen has an oxidation number of +2 because the single oxygen atom has gained a total of two electrons, one from each hydrogen. Here is another molecule involving hydrogen and oxygen – hydrogen peroxide, H 2 O 2: In hydrogen peroxide, each hydrogen still has an oxidation number of +1 because each hydrogen gives up a single electron to oxygen.

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

https://chemed.chem.purdue.edu/genchem/topicreview/bp/ch2/oxnumb.html
Oxidation Numbers – Division of Chemical Education, Purdue University
The oxidation number of an atom is zero in a neutral substance that contains atoms of only one element. Thus, the atoms in O , and aluminum metal all have an oxidation number of 0. 2. The oxidation number of simple ions is equal to the charge on the ion.

https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/v/worked-example-using-oxidation-numbers-to-identify-oxidation-and-reduction

https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:chemical-reactions/x2eef969c74e0d802:oxidation-reduction-redox-reactions/v/worked-example-using-oxidation-numbers-to-identify-oxidation-and-reduction
Using oxidation numbers to identify oxidation and reduction (worked …
And remember, oxidation is losing electrons. Oil rig, reduction is gaining electrons, or reduction is a reduction in the oxidation number. So first, let’s look at the iodine. We go from an oxidation number of negative one to zero. So to go from an oxidation number of negative one to zero, you need to lose electrons.

https://socratic.org/chemistry/electrochemistry/oxidation-numbers

https://socratic.org/chemistry/electrochemistry/oxidation-numbers
Oxidation Numbers – Chemistry | Socratic
Oxidation numbers are formal charges assigned to atoms in compounds or ions based on their valence electrons and bonding. Learn how to calculate, interpret and balance oxidation numbers with examples and rules.

https://www.wikihow.com/Find-Oxidation-Numbers

https://www.wikihow.com/Find-Oxidation-Numbers
How to Find Oxidation Numbers: 12 Steps (with Pictures) – wikiHow
4 oct. 2023Oxidation numbers are numbers assigned to atoms (or groups of atoms) that help chemists keep track of how many electrons are available for transfer and whether given reactants are oxidized or reduced in a reaction. lesoutrali bot