Modules 29, 30, and 31:Lewis Structures, MolecularStructure and Polarity, andAdvanced Theories of CovalentBondingCHEM 101 Winter ‘21Announcements and Reminders (Day 15 of 19)●Live lecture schedule: MW 8:30a - 9:30a; 11a - 1p andTuTh 8:30a - 12p●Exam 2 results: high 105/108, average 58% → addingpoints to make average 62%○5 points added to all exams●Exam 4 available from Sunday, 1/31 - Monday, 2/1 at 10a,resume lecture at 11a - 1p○New format: 30% ALEKS, 70% shown work○Test prep strategies?■Stay on top of ALEKS homework■Tutoring/recitation■Using the end-of-chapter exercises in OpenStax■Work through easier problems first, then back to difficult○Revisit “Developing a Mindset for Successful Learning”●Random attendance EC opportunity●Questions?Lewis structures●Lewis symbols●Lewis structures●Resonance structures●Formal charge●Exceptions to octet rule○Less than octet (B)○Exceeds octet●Electronegativity●Energy of covalent bondsElectronegativityThe ability of an atom in a molecule to attract shared electrons to itself“slide”
