In the reaction #Mg(s) + 2H_2O(l) -> Mg(OH)_2(s) + H_2(g)#, what is the oxidation state of #Mg# in #Mg(s)#?
In uncombined or elemental state oxidation No is Zero as there occurs no permanent gain or loss of electron between the atoms having same electro-negativity.
Oxidation state is defined as the charge an atom might be assumed to have when electrons are counted according to set of rules which have been agreed upon:
The first rule
- the oxidation state of a free element (uncombined element) is taken as zero.