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Lecture

Chem 101 Lecture September 20.docx

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Department
Chemistry
Course
CHEM101
Professor
Yoram Apelblat
Semester
Fall

Description
Chem101LectureSeptember202013ExampleWriteelectronconfigurationforXeandWXeatomicnumber5454electronsneeded2262621062106o1s2s2p3s3p4s3d4p5s4d5pWatomicnumber7474electronsneededoCopywhatwasgivenforXe22626210621062144o1s2s2p3s3p4s3d4p5s4d5p6s4f5doXe6s24f145d4ForanyelementthatcomesafterXesameconfigurationupto54electronswillbereferencedAlwaysreferencepreviousnoblegaswhenusingshortform1026ForXeKr5s4d5pConfigurationExceptionsCr25oPredictedAr4s3d110oObservedAr4s3dCu29oPredictedAr4s3d110oObservedAr4s3dIonicConfigurationGroups1and2tendtoloseelectronsbecausetheywillformaconfigurationsimilartoprecedingnoblegasformingastableatomGroups16and17tendtogainelectronstoob
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