Bio181FinalExamGuide3 - 6. Biomolecules. a. atomic...

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6. Biomolecules. a. atomic structure electrons , which have a negative charge , a size which is so small as to be currently unmeasurable, and which are the least heavy (i.e., massive) of the three; protons , which have a positive charge, and are about 1836 times more massive than electrons; and neutrons , which have no charge, and are about 1839 times more massive than electrons b. chemical element – pure substance made up of one kind of atom c. physical properties – can be described without reference to other elements d. chemical properties – describe how al element reacts with other elements e. electrons: the behavior of electrons is the most important factor in the chemistry of life. -ground – normal level of electron - excited states – strong tendency to return to its ground state - ionization – transfer of one or more electrons from one atom to another f. types of bonds a. polar - a measure of the tendency of an atom to attract a bonding pair of electrons. b.
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This note was uploaded on 04/21/2008 for the course BIO 181 taught by Professor Milton during the Spring '08 term at N.C. State.

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Bio181FinalExamGuide3 - 6. Biomolecules. a. atomic...

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