1.34 explain, using dot and cross diagrams, the formation of covalent compounds by electron sharing for the following substances

1.34 •hydrogen:                     

        •chlorine:

        •hydrogen chloride:

        •water:

        •methane:

        •ammonia: 

        •oxygen:

        •nitrogen:

        •carbon dioxide:

        •ethane: 

        •ethene:

        

*google for the covalent images*