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Exploring Solid-State Structure and Physical Properties: A Molecular and Crystal Model ExerciseThomas H. Bindel This laboratory allows students to examine relationships among the microscopicmacroscopicsymbolic levels using crystalline mineral samples and corresponding crystal models. The exercise also reinforces Lewis dot structures, VSEPR theory, and the identification of molecular and coordination geometries. Bindel, Thomas H. J. Chem. Educ.2008, 85, 822.
Crystals / Crystallography |
Molecular Properties / Structure |
Molecular Modeling |
Solids |
VSEPR Theory |
Lewis Structures |
Physical Properties
Electronegativity and the Bond TriangleTerry L. Meek and Leah D. Garner The dependence of bond type on two parameters, electronegativity difference (??) and average electronegativity (?av), is examined. It is demonstrated that ionic character is governed by the partial charges of the bonded atoms, and metallic character by the HOMOLUMO band gap. Meek, Terry L.; Garner, Leah D. J. Chem. Educ.2005, 82, 325.
Atomic Properties / Structure |
Covalent Bonding |
Metallic Bonding |
Ionic Bonding |
Main-Group Elements
Teaching Molecular Geometry with the VSEPR ModelRonald J. Gillespie The difficulties associated with the usual treatment of the VB and MO theories in connection with molecular geometry in beginning courses are discussed. It is recommended that the VB and MO theories should be presented only after the VSEPR model either in the general chemistry course or in a following course, particularly in the case of the MO theory, which is not really necessary for the first-year course. Gillespie, Ronald J. J. Chem. Educ.2004, 81, 298.
The Shapes of MoleculesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Molecular Properties / Structure
Multiple Bonds and Molecular ShapesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Molecular Properties / Structure
Monomer of KevlarWilliam F. Coleman The WebWare Molecules for July are from the paper Modern Sport and Chemistry: What a Chemically Aware Sports Fanatic Should Know by Giffin, Boone, Cole, McKay and Kopitzke.
