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Hardness of Solid Substances - Grinding A number of metals and nonmetals are ground with a mortar and pestle. The nonmetals shown here are all soft (due to weak intermolecular forces), but the metals vary in hardness.
Covalent Bonding |
Nonmetals |
Physical Properties |
Solids |
Metallic Bonding |
Metals
Assessment Questions: First 3 results
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.
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
How We Teach Molecular Structure to FreshmenMichael O. Hurst Examination of how textbooks discuss various aspects of molecular structure; conclusion that much of general chemistry is taught the way it is for historical and not pedagogical reasons. Hurst, Michael O. J. Chem. Educ.2002, 79, 763.
Covalent Bonding |
Atomic Properties / Structure |
Molecular Properties / Structure |
Lewis Structures |
VSEPR Theory |
Valence Bond Theory |
MO Theory
Electronegativity and Bond Type: Predicting Bond TypeGordon Sproul Important limitations with using electronegativity differences to determine bond type and recommendations for using electronegativities in general chemistry. Sproul, Gordon. J. Chem. Educ.2001, 78, 387.
