CHEM 1061 1ST Edition Lecture 22 Outline of Last Lecture I Last lecture was a review session for Midterm 2 Outline of Current Lecture II Electron Configuration for Cl Br and I III Transition Elements IV Periodic Trends a Atomic Size Radius b Ionization Energy c Electron Affinity Current Lecture Electron Configuration for Cl Br and I Cl 17 e 1s 2 2s 2 2p 6 3s 2 3p 5 Br 15 e 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 5 I 53 e 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 5 Full e configuration start at 1s then fill the rest in condensed configuration is called noble gas shorthand Noble gas shorthand for Br 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 5 Ar first 18 electrons Ar 4s 2 3d 10 4p 5 Inner core electrons LOWEST energy electrons complete series valence electrons highest n value electrons for main group s p block Noble Gas shorthand for I 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 5 Kr Kr 5s 2 4d 10 5p 5 These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Ground State electron configuration electrons are in lowest energy state filling up in increasing energy Ex F 1s 2 2s 2 2p 5 Excited State SAME NUMBER OF ELECTRONS but some are not in the lowest energy state Ex What element am I 1s 2 2s 1 3d 5 4s 1 answer fluorine count electrons Excited ground EMIT a photon Transition Elements Table 8 4 in textbook n 1 d fill between ns 2 and np 6 3d between 4s 2 and 4p 6 Predict Cu Ar 4s 2 3d 9 Actual Cu Ar 4s 1 3d 10 Extra stability with half filled and fully filled subshells copper and chromium families does this Filling in f orbital Pb 82 e Xe 6s 2 4f 14 5d 10 6p 2 Periodic Trends 1 Atomic Size radius 2 Ionization Energy 3 Electron Affinity going to spend less time on this Atomic Size Radius Atomic radius is the distance between adjacent nuclei Smallest largest Northeast southwest ON PERIODIC TABLE Smallest Largest North South Down a group adding more shells of electrons which increase the N value meaning larger atoms Largest Smallest West East Higher z efficiency pulls electrons in stronger smaller size
View Full Document
Unlocking...