3.4. What Are the Two Major Types of Chemical Bonds?, 73
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Sodium Chloride Crystal Cleavage A knife is placed on a large sodium chloride crystal parallel to a cleavage plane. When the knife is tapped, the crystal breaks cleanly, creating two smaller crystals.
Bonding : MatchBondStrength (8 Variations)
Match each of the following molecules to the best energy value for each bond. Do not use the table of bond energies in your book, but predict these values using your knowledge of bond length and bond strength.
Possible energies are: 300 kJ/mol, 330 kJ/mol, 415 kJ/mol and 950 kJ/mol.
A New "Bottom-Up" Framework for Teaching Chemical BondingTami Levy Nahum, Rachel Mamlok-Naaman, Avi Hofstein, and Leeor Kronik This article presents a general framework for bonding that can be presented at different levels of sophistication depending on the student's level and needs. The pedagogical strategy for teaching this model is a "bottom-up" one, starting with basic principles and ending with specific properties. Levy Nahum, Tami; Mamlok-Naaman, Rachel; Hofstein, Avi; Kronik, Leeor. J. Chem. Educ.2008, 85, 1680.
Atomic Properties / Structure |
Covalent Bonding |
Ionic Bonding |
Lewis Structures |
Materials Science |
MO Theory |
Noncovalent Interactions
Predicting the Stability of Hypervalent MoleculesTracy A. Mitchell, Debbie Finocchio, and Jeremy Kua In this exercise, students use concepts in thermochemistry such as bond energy, ionization potentials, and electron affinities to predict the relative stability of two hypervalent molecules (PF5 and PH5) relative to their respective non-hypervalent counterparts. Mitchell, Tracy A.; Finocchio, Debbie; Kua, Jeremy. J. Chem. Educ.2007, 84, 629.
Computational Chemistry |
Covalent Bonding |
Ionic Bonding |
Lewis Structures |
Molecular Modeling |
Calorimetry / Thermochemistry |
Molecular Properties / Structure
Entropy and the Shelf Model: A Quantum Physical Approach to a Physical PropertyArnd H. Jungermann A quantum physical approach relying on energy quantization leads to three simple rules which are the key to understanding the physical property described by molar entropy values. Jungermann, Arnd H. J. Chem. Educ.2006, 83, 1686.
