This chemistry video tutorial discusses the exceptions to the octet rule while providing the lewis dot diagrams of the molecular compounds involved. BH3 has an incomplete octet - that is, it has less than 8 electrons. Molecules such as ICl5 and PCl5 have an expanded octet which means the center atom has more than 8 electrons. The last category are molecules with odd number of electrons such as NO and NO2. These will always be electron deficient and contain an incomplete octet at the nitrogen atom. How To Draw Lewis Structures: https://www.youtube.com/watch?v=NFZtjSeT3XE VSEPR Theory: https://www.youtube.com/watch?v=DBrq31w8vC4 Molecular Geometry: https://www.youtube.com/watch?v=_Cw0_cJzkSI Lewis Dot Structures: https://www.youtube.com/watch?v=Ymf3kZePDnU Lewis Structures of Ionic Compounds: https://www.youtube.com/watch?v=xhItoqhHoEE _________________________________ Octet Rule Exceptions: https://www.youtube.com/watch?v=96L6_IwyHRM Resonance Structures: https://www.youtube.com/watch?v=9B5FGPDwX_E Polar and Nonpolar Molecules: https://www.youtube.com/watch?v=4ykSzYl_4vI Formal Charge Calculations: https://www.youtube.com/watch?v=R_SIjijCouE Lewis Structures - Mega Review: https://www.youtube.com/watch?v=PeY_sihSh8E ________________________________ Hybridization of Atomic Orbitals: https://www.youtube.com/watch?v=pdJeQUd2g_4 Molecular Orbital Theory: https://www.youtube.com/watch?v=6tB6E6R_XpQ Dipole Dipole Forces of Attraction: https://www.youtube.com/watch?v=zOvnu0KYyxo Hydrogen Bonding: https://www.youtube.com/watch?v=ZDjJOqOKeCI Unit Cell Chemistry: https://www.youtube.com/watch?v=HCWwRh5CXYU _________________________________ Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets: https://www.patreon.com/MathScienceTutor/collections