Valency implies the estimate of the combining potential of an element.
Valency refers to the number of electrons that must be lost or gained by the element to attain a stable electronic configuration.
Valency is inferred by the number of valence electrons.
Valency is the fundamental domain of every element which depicts its stability.
The valency of Hydrogen is 1 as it has atomic number 1 with electronic configuration.
The electrovalency of the Hydrogen can be either +1 or -1.
If hydrogen donates an electron forming cation then its valency will be +1.
If Hydrogen accepts an electron to attain duplet configuration then valency will be -1.
The covalency of Hydrogen is +1 as it will share electrons forming a single bond and completing its duplet.
Final Answer:
Valency is the combining capability of an atom. The valency of Hydrogen is 1.