Molecules and covalent bonds

A covalent bond is formed by two non-metal atoms by sharing one or more pairs of electrons in the overlap in order to have a full outer shell. A full valence shell is a stable arrangement, so noble gases do not react, and have chemical stability.

hydrogen gas die not consist of individual atoms (mono atomic) but contain two hydrogen molecules h2(diatomic)

the pairing allows the atoms to share electrons  (one from each Shell) so that each hydrogen atom has two electrons in its valence shell.The…