# 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)?

Mar 26, 2016

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.

Mar 27, 2016

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.