A bond between the two atoms are formed by the sharing of electrons. Which generally form between two non- metals. Example Nitrogen dioxide.
Covalent compounds cannot dissociate into the water. So poor conductor of electricity in aqueous solution.
PROPERTIES OF COVALENT COMPOUNDS :
MOLECULAR FORM :
Covalent compound exist as a separate molecules. Because they are formed by neutral atoms and the force of attraction between these molecules is small.
Due to weak inter molecular forces generally covalent compounds are liquid and gases. Some covalent substances are solid like iodine.
They are volatile.
MELTING POINT AND BOILING POINT :
Generally they have low melting point and boiling point.
SOLUBILITY IN WATER :
Covalent compounds are generally in soluble in water.
SOLUBILITY IN THE ORGANIC COMPOUND :
Covalent compounds are non - electrolyte because they do not conduct electricity.
ELECTRICAL CONDUCTIVITY :
- Non polar covalent compounds do not conduct electricity.
- Polar covalent compounds conduct small amount of electricity.