Chemistry of Life

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Unit 1: Chemistry of Life
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Chemistry of Life
1 Intro to Biochemistry
1.1 basic structure of atom
1.1.1 atomic number = # protons
1.1.1.1 also # electrons when overall charge neutral
1.1.2 atomic mass = # protons + neutrons
1.2 matter - "stuff"
1.2.1 element - pure substances of earth
1.2.1.1 ex. C, Al, O, N
1.2.2 atom - single unit of element
1.2.2.1 ex. H+ is atom
1.2.3 compound - combination of elements
1.2.3.1 ex. H2O
1.2.4 molecule - 2 or more atoms combined
1.2.4.1 ex. O2, FeSCN
1.3 bonds
1.3.1 covalent - share electrons
1.3.1.1 polar covalent
1.3.1.1.1 one electronegative element + less electronegative element
1.3.1.1.2 gives more e- element slightly negative charge
1.3.1.1.3 gives less e- element slightly positive charge
1.3.1.1.4 ex. O-H, C-O
1.3.1.2 nonpolar covalent
1.3.1.2.1 equal distribution of electrons
1.3.1.2.2 ex. C-C, C-H
1.3.1.3 single - one pair e-s
1.3.1.3.1 double - two pair e-s
1.3.1.3.1.1 triple - three pair e-s
1.3.1.3.1.1.1 ex. C-=C
1.3.1.3.1.2 ex. O=O
1.3.1.3.2 ex. H-H
1.4 reactions
1.4.1 endergonic - PEi < PEf
1.4.2 PEi > PEf
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