oxidation state

oxidation state
noun
the degree of oxidation of an atom or ion or molecule; for simple atoms or ions the oxidation number is equal to the ionic charge
-

the oxidation number of hydrogen is +1 and of oxygen is -2

• Syn: ↑oxidation number
• Hypernyms: ↑number

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noun or oxidation number
: the degree of oxidation of an element or atom (as in a compound) that is usually expressed as a positive or negative number representing the ionic charge or effective charge of the element or atom

the usual oxidation state of hydrogen is +1 and of oxygen -2

— compare valence 1 a

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Chem.
the state of an element or ion in a compound with regard to the electrons gained or lost by the element or ion in the reaction that formed the compound, expressed as a positive or negative number indicating the ionic charge of the element or ion. Also called oxidation number.
[1945-50]

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oxidation state,
Chemistry. the state of an element or atom in a compound with respect to the number of electrons it has lost or gained, expressed as a positive or negative number indicating the ionic charge of the atom and equal to its valence. In most of their compounds, the oxidation state of oxygen is ―2 and that of hydrogen is + 1.

Useful english dictionary. 2012.

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