# What is the typical valency of hydrogen?

Do you mean $\text{valency?}$
Hydrogen typically displays a valency of $+ I$ or $- I$.
It can form hydrides with metals, i.e. $M H$ or $M {H}_{2}$, in which the hydrogen atom has an oxidation of $- I$, and it can typically form hydroxides, in which its oxidation number is $+ I$.