CHM 303 1st Edition Lecture 2Outline of Last Lecture Discuss Course Syllabus, Objectives and ExpectationsChapter 1: Structure Determines Properties and redox regulation of gene transcription Outline of Current Lecture I. StructureA. Ionic BondsB. Covalent Bonds1. Lewis structures2. Formal charges3. Resonance4. Dipole momentsCurrent LectureI. StructureA. Ionic bondsEx. Na: {Ne} ___ Na+: {Ne} F: {He} ___ ___ ___ ___ F-: {He} 2s2 2p6 or {Ne}Na F Na+ FThese 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. 3s2s 2p. . . . .. : : :. . . .*Moving Sodium’s one valence electron to Fluorine’s one open spot in valence electrons to satisfy by elements’ desire to have a full octet.* B. Covalent bondsEx. :F. .F: :F—F:1. Lewis Structures-see example above2. Formal Charges# of elements valence electrons 1/2 (electrons from covalent bonds) - # of lone pairs on element = formal charge of element3. Resonance-same compound, two way to draw it-least electronegative element usually in middle of configu-ration4. Dipole moments-a measure of compound’s polarity.. .. .. .... .. ..
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