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    | • | Remember covalent
    cmpds-- 
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    |  | 
   
    | • | A _________ is
    the smallest unit of a covalent 
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    |  | 
   
    |  | cmpd that retains
    the characteristics of the cmpd. 
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    |  | 
   
    |  | Molecule - two or more atoms in a definite 
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    |  | 
   
    |  | arrangement held
    together by chemical bonds. 
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    |  | (H2O,  Cl2) [Cl2 is
    considered a molecule but not a 
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    |  | cmpd] 
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    |  | 
   
    | • | Molecular cmpds
    exist as 
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