Question

what hapens to the oxidation number of element during oxidation​

Answer 1

Answer:

The oxidation number of an element indicates the hypothetical charge of an atom in a compound. ... When the number of electrons associated with an atom changes, its oxidation number also changes. When an element loses an electron, its oxidation number increases.

Answer 2

In an oxidation-reduction, or redox, reaction, one atom or compound will steal electrons from another atom or compound. A classic example of a redox reaction is rusting. When rusting happens, oxygen steals electrons from iron. Oxygen gets reduced while iron gets oxidized.

Oxidation is damaging to our cells and we have devised mechanisms to help mitigate the damage. So, in this sense oxidation is bad for living organisms.