Biol 112 - #2 - January 7

Biol 112 - #2 - January 7 - 2 Friday, January 7, 2011 Small...

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2 Small Molecules 2 Bonds, Acids and Bases Friday, January 7, 2011
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When Chemicals Bond H N O i love you! you are so positive! H H H C boo hoo ! + ! - H ! - C H ! + Friday, January 7, 2011
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to understand chemical bonding, we need to move past the “simple” Bohr model for electrons Friday, January 7, 2011
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Friday, January 7, 2011
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Properties of Molecules covalent bonds are strong, two (or 4, rarely 6) electrons are shared Friday, January 7, 2011
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nobel gases shell is flled He: 1 s , 2 e Ne: 2 s , 8 e 1 s , 1 e 2 s , 1 e 2 s , 4 e 2 s , 5 e 2 s , 6 e 2 s , 7 e why hydrogen is the liFe oF the party C can form single covalent bonds with 4 H combine O with two H, and you can have a pool party Friday, January 7, 2011
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• A double covalent bond occurs when atoms share two pairs of electrons. ethane H 2 C=CH 2 • A triple covalent bond occurs when atoms share three pairs of electrons. nitrogen (gas at 25˚C) N ! N is N 2 a gas at -120 ˚C? Friday, January 7, 2011
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nitrous oxide and ozone N N + " O - - N = N + = O N 2 O + O 2 NO + NO 2 NO + O 3 NO 2 + O 2 like any equation, both sides must balance ozone Friday, January 7, 2011
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Properties of Molecules models provide useful information pairing (Bohr, formulae) bond angles (ball-stick), shape (space-Flling) Friday, January 7, 2011
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: the tendency of an atom to attract electrons when it occurs as part of a compound
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This note was uploaded on 03/14/2011 for the course SCIENCE 112/120 taught by Professor Mitamaer/vogel during the Spring '11 term at McGill.

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Biol 112 - #2 - January 7 - 2 Friday, January 7, 2011 Small...

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