BIOL 1001 Jan29

BIOL 1001 Jan29 - BIOL 1001 Jan.29 Octet Rule for Electron...

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BIOL 1001 Jan.29 Octet Rule for Electron Shells Electrons fill the shell closest to the nucleus and then begin to occupy the next shell o 1 st electron shell: 2 electrons o 2 nd electron shell: 8 electrons o 3 rd electron shells: 8 electrons How do atoms interact to from molecules? Definitions: A molecule consists of 2 or more atoms. O 2 A compound is a molecule composed of a mixture of different atoms. O 3 It’s all about the outer shell electrons Reactive - outer shell partially filled. Hydrogen – only 1 on outer shell; when outer shell is not full Inert - outer shell filled. Helium; inert gases Bonding Involves Electrons 1. One pair electrons per bond 2. Outer electrons form bonds 3. Behave using “octet rule 4. If more than 4 in outer shell = Desires more electrons (accepts electrons) 5. If less than 4 in outer shell = desires fewer electrons (donates electrons) Chemical Bonds (Table 2-2) Chemical Bonds - Force of attraction between atoms that holds them together as a
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This note was uploaded on 09/19/2011 for the course BIOL 1001 taught by Professor Minor during the Spring '08 term at LSU.

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BIOL 1001 Jan29 - BIOL 1001 Jan.29 Octet Rule for Electron...

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