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# Write rules for assigning oxidation numbers.

Last updated date: 20th Mar 2023
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Hint :Oxidation state: It is the number of electrons which are lost or gained by a neutral atom while a chemical bond is formed. It can also be termed as oxidation number. If the electrons are lost by a neutral atom, then the oxidation number will have a positive value whereas if a neutral atom gains an electron, then it will have a negative oxidation state.

The oxidation state of oxygen atoms is $( - 2)$ but there is an exceptional case of peroxides that is in peroxides the oxidation number for oxygen atoms is $( - 1)$ .
Generally, the oxidation number for hydrogen atoms is $( + 1)$ but in case of compounds which have less electronegative elements than hydrogen, for that case oxidation number for hydrogen atom is $( - 1)$ .