Friday, October 12, 2012

COVALENT BOND : ( chemical bonds )



               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.

STATE :
                   Due to weak inter molecular forces generally covalent compounds are liquid and gases. Some covalent substances are solid like iodine.

VOLATILITY :
                   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. 

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