Answer:
The single covalent bond is represented by a single ' - ' and it has 2 shared electrons from the the bonding atoms.
Double covalent bond is denoted with '=' and it has 4 shared electrons
Triple covalent bond is denoted by ' _=' and it has 6 shared electrons
Explanation:
In single covalent bond each participating atom contributes one electron each to be equally shared between them in order to form a single covalent bond. Thus a single covalent bond is formed when atoms share 2 electrons together
The double covalent bond is formed when each participating atom contributes two electrons each to be equally shared between them in order to form a double covalent bond. Thus a double covalent bond results from the sharing of 4 electrons together by two atoms. For example the formation of oxygen gas molecule
In triple covalent bonds, 6 electrons are shared and each pair of electrons forms a bond which results in triple covalent bonds. Each atom contributes 3 electrons for equal sharing.
