Question

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

Answer 1

Answer:

Every atom tries to be stable under normal circumstances. An atom can be stable if it's outermost octet is complete. Therefore, as the atomic number of hydrogen is 1 it needs one more electron to complete it's outermost octet. Hence 2 hydrogen atoms form covalent bonds with each other that is share one electron each. This is the reason why hydrogen occurs in diatomic form in normal circumstances. We get something like this if we draw the electron dot structure -

H:H

Answer 2

it occur in a diatomic rather then monoatomic because of it valency