In a diatomic molecule of nitrogen, a triple bond exists between the two nitrogen atoms.

The bonding between oxygen and hydrogen in water is characterized by single covalent bonds, as each hydrogen atom shares one electron with the oxygen atom.

In a molecule of water, there are two shared pairs of electrons between one oxygen atom and two hydrogen atoms.

Chlorine forms a single covalent bond in Cl₂ by sharing a pair of electrons between two chlorine atoms, each contributing one electron. This bond satisfies the octet rule for both chlorine atoms, allowing them to achieve stability.

There are seven electrons present in the valence shell of a chlorine atom.