BIOL 1201 Lecture Notes - Lecture 2: Covalent Bond, Ph, Sodium Hydroxide
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08/09/2014 (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Molecule: substance consisting of two or more different atoms, in specific proportions, bonded together in a specific pattern, smallest unit of compound that retains all chemical and physical properties of the compound. Molecules with the same molecular formula, but a different arrangement of atoms. Glucose, galactose, and fructose are isomers all c6h12o6. Structural isomers two substances having the same molecular formula but different physical and chemical properties because the arrangement of their component atoms is different. Cis-trans isomers cis isomers and trans isomers often have different physical properties. Differences between isomers, in general, arise from the differences in the shape of the molecule or the overall dipole moment. Enantiomers each of a pair of molecules that are mirror images of each other. The sum of the atomic masses for all the atoms in a molecule. H2o = (1*2) +16 = 18 daltons. Co2 = (16*2) +12 = 44 daltons.