Basic Chemistry 2 - WeakBonds: .Occur .Oneatominvol

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Weak Bonds: Bonds which are not involved in making a substance  A bond which is the result of very weak electrical attractions between atoms on different  molecules or different parts of a large molecule are HYDROGEN BONDS. Occur  between molecules that have polar covalent to ionic bonds. One atom involved must be  Hydrogen.  (figure 3.2) (figure 2.16)  MOLECULES AND COMPOUNDS:  A compound is : a substance consisting of two or more different atoms, in specific  proportions, bonded together in a specific pattern  A molecule is : the smallest unit of a compound that retains all the properties of that  compound (1 water molecule, if divide it up just have H and O, not the H2O compound) Molecular formulas: (ex: water—H 2 0; carbon dioxide—CO 2 ; glucose—C 6 H 12 O 6  (hexose  sugars all have the same molecular formula; galactose, fructose, glucose)  Isomers: molecules with the same molecular formula, but a different arrangement of  atoms (Figure 4.7)  Molecular weight: the sum of the  atomic masses  for all of the atomes in a molecule;  H 2
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