Covalent Bonds

    Electron Sharing
        -chemical bond formed when 2 atoms share electrons
 
                F.  +  .F          F:F
    How many bonds
        -single bond
            F:F

        -double bond
            O::O
 
        -triple bond
            :N:::N:

    Each bond involves 2 electrons

    Properties of Molecular Compounds
        -lower  boiling point than ionic bonds
        -poor conductors of electricity

    Sharing of Electrons
        - polar: Some atoms pull more on the electrons than others
                                    H : Br  from Beyond Books
                                     -->
        - nonpolar: Equal pull between atoms
                                     H : H from Beyond Books
                                 <---   --->

    Attractions between molecules
        difference in the attractions between molecules lead to different properties in polar and non olar compounds

            polar - dissolves in water

            nonpolar - do not dissolve well in water (i.e. oil)