Question

What is a single covalent bond, double covalent bond, and triple covalent bond?

Answer 1

Single covalent bond

A bond formed by the sharing of $2$ electrons between the atoms, each atom contributing one electron for sharing, is called a single covalent bond. It is denoted by putting a short line ($-$) between the two atoms, e.g., $\mathrm{H}-\mathrm{H}$.

Double covalent bond

A bond formed by sharing two pairs of electrons between two atoms, each atom contributing two electrons for sharing, is called a double covalent bond. It is represented by putting two short lines ($=$)between the two atoms, e.g., O = O.

Triple covalent bond

A bond formed by sharing of $6$ electrons between two atoms, each atom contributing three electrons for sharing, is called a triple covalent bond. It is represented by putting three short lines ($\equiv$) between the two atoms, e.g., $\mathrm{N}\equiv \mathrm{N}$.