How do we find the oxidation number of an element?
For an element, the oxidation number is easy to assign.......
The oxidation number of any element is
Of course these designations are completely conceptual, nevertheless, these ideas are useful for writing and balancing redox reactions. We consider here the oxidation of iodine to periodate ion,
On the other hand, elemental iodine, has neither accepted nor donated electrons, and its oxidation state is formally
This is only the oxidation half equation, and a reduction of something (oxygen?) is necessary.
We can write a complete redox reaction for combustion reactions:
Elemental (and zerovalent) carbon is oxidized to