Question

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)`?

Answer 1

Zero

Explanation:

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.

Answer 2

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:

Explanation:

The first rule

1. the oxidation state of a free element (uncombined element) is taken as zero.