07 - Chemistry 1000 Lecture 7: The periodic table and...

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Unformatted text preview: Chemistry 1000 Lecture 7: The periodic table and electronic configurations Marc R. Roussel IMPORTANT You are expected to learn the names, symbols, and positions in the periodic table of all the elements in the first four periods (up to and including Kr). http://www.ptable.com Electron configurations and the periodic table I F, Cl, Br I Cr, Mo, W I How the periodic table should look http: //en.wikipedia.org/wiki/Periodic_table_(wide) I Reading electron configurations off the periodic table http://www.ptable.com Periodic table blocks f block d block s block p block Ions I A closed (full) shell (noble gas configuration) represents a particularly stable electronic configuration. I Common ions are often those which have gained or lost electrons to obtain a closed shell. Examples: I Na has a ground-state electronic configuration of 1s 2 2s 2 2p 6 3s 1 . Removing the 3s electron leaves us with the noble gas configuration 1s 2 2s 2 2p 6 , so a sodium ion is Na + ....
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07 - Chemistry 1000 Lecture 7: The periodic table and...

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