Why does hydrogen occur in a diatomic form rather than in a monoatomic form under normal conditions?

(N/A) hydrogen atom has only one electron,which is one electron less than the stable inert gas configuration of helium $(1s^2)$.
To attain the stable electronic configuration of helium,each hydrogen atom shares its single electron with another hydrogen atom.
This sharing of electrons results in the formation of a stable diatomic molecule $(H_2)$.