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Formation of covalent compound

Atoms Molecules Ions Chemical Equations On-line practice

 

 

Covalent compounds are formed between non-metallic elements.  It involves electron sharing with no transfer of electrons.  Therefore, no charged particles are formed.  Only groups of atoms called molecules are formed.

Formation of chlorine molecule

Each chlorine atom has 7 electrons in its outermost shell.  That means it is one electron short of the stable octet (i.e. 8 electrons) in the third shell.  It achieves stability by sharing one electron with another chlorine atom, which in turn shares one of its electrons.  This shared pair of electrons forms a single covalent bond.

 

Other examples :

 

                                        

 

Properties of covalent compound ]