Darcy Mack

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Molecular Modeling of Bond Type, Polarity, and Resonance Using Models 360 part of Pedagogy in Action:Partners:ChemEd DL:Activities
In this computer-based lab, students compare a series of compounds (ethane, ethene, ethyne as well as propane, propene, and propyne) in terms of Lewis structure, C-C and C-H bond length, bond angle, type of C-C bond, and hybridization to understand how type of bond affects bond length and bond angle. Then students draw the shapes and net dipoles for various compounds and compare their shapes to the computer generated models and dipole moments. Students will also compare ozone and the carbonate ion in terms of bond length, bond angle, dipole moment, and electrostatic charge to help them better understand resonance. Students will use the free web-based program Models 360 to complete their investigation.