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This month's cover provides full-color versions of all of the figures
in "Teaching Chemistry with Electron Density
Models" by Shusterman and Schusterman. The authors provide a
cinvincing rationale for using two- and three-dimensional models
of atomic, ionic, and molecular electron density in teaching both
general and organic chemistry. They use such models to teach atomic
and molecular size; ionic, covalent, and polar-covalent bonding;
multiple bonding and bond order; elecctron delocalization; acid-base
behavior and intermolecular forces, including hydrogen bonding between
DNA base pairs. The figure illustrates an electrostatic potential
model for the interaction between guanine and cytosine that shows
clearly how regions of high electrostatic potential in guanine match
with regions of low electrostatic potential in cytosine, and vice
versa.
The cover was designed by Betsy True.
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Always in the