The oxidation state, sometimes referred to as oxidation number, describes the degree of oxidation (loss of electrons) of an atom in a chemical compound.Conceptually, the oxidation state, which may be positive, negative or zero, is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic, with no covalent component.Dec 01, 2020 · (c) The oxidation number of hydrogen in a compound is always +1 except when hydrogen combines with reactive metals in metal hydrides, where it is -1. For example, (d) The oxidation number of oxygen in a compound is always -2 except in peroxides and when oxygen combines with a more electronegative element such as fluorine.
oxidation and reduction, complementary chemical reactions characterized by the loss or gain, respectively, of one or more electrons by an atom or molecule. Originally the term oxidation was used to refer to a reaction in which oxygen combined with an element or compound, e.g., the reaction of magnesium with oxygen to form magnesium oxide or the combination of carbon monoxide with oxygen to ...
Calcium and bromine ionic or covalent
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