The capability of carbon to establish bonds with other atoms by participating its valence electrons is known as tetravalency. This principally means that carbon has four valence electrons ( external electrons that are available for forming bonds with other titles), carbon is called tetravalent. A tetravalent element is an essential with four electrons available to form bonds with other atoms.
Tetravalency of Carbon
The element that is capable of bonding with other atoms of elements or with the atoms of other monovalent elements is known as the tetravalent state of an atom with four electrons available for covalent chemical bonding in its valence.