# What is the oxidation number of hydrogen in H2?

Nov 3, 2015

Zero

#### Explanation:

The oxidation number of atoms of elements at their standard states is $\textcolor{b l u e}{Z e r o}$.

Therefore, For ${H}_{2}$ the oxidation number is $\textcolor{b l u e}{Z e r o}$.

For $N a$ element: $0$
For $N a$ in $N a C l$ is $+ 1$.