Experimental and theoretical data are presented which verifies the existence of the hydronium ion. This existence was confirmed directly by x-ray and neutron diffraction in hydrochloric acid. Recommended is the abandonment of the erroneous hydrogen ion formulation and names such as proton hydrate. (BT)

A discussion is presented on what should be taught about orbitals in high school chemistry. (BB)

Discusses Bohr's atomic theory from a chemical, rather than a physical, standpoint. (MLH)

Discusses the complexity of chemistry concepts and the identification of instructional barriers in terms of current learning theories. Recommends teaching to improve students' conceptual understanding. Contains 34 references. (WRM)

Faculty who introduce active learning methods often perceive striking changes in student competence. Describes an assessment strategy designed to determine whether such changes in student skills are observable by independent and unbiased observers. Contains 16 references. (DDR)

Addresses the distinction between conceptual and algorithmic learning and the clarification of what is meant by a second-tier student. Explores why novice learners in chemistry and physics are able to apply algorithms without significant conceptual understanding. (DDR)

This article discusses the author's observation that in his thirty-plus years in academics, many students who, by natural ability, interest, and work ethic, should have performed well in the sciences, but performed poorly. Many of these students are operating at the bottom rungs of Bloom's taxonomy (ladder), while college professors and industrial…

Describes the static and dynamic structural features for metal derivatives of cyclopentadiene. (SL)

Reviews research which has found variations in the decay rate for various types of radioactive decay. (SL)

A secondary school teacher presents his teaching methodology concerning the kinetic theory of gases and gas laws. (CP)

Discusses the introduction of element evolution and isotopic composition as topics for introductory chemistry courses. (SL)

Presents a quantum mechanical model of the ionic solid, lithium hydride. (SL)

Describes an undergraduate spectroscopy laboratory experiment involving the absorption spectrum of benzene. (SL)

Discusses a revised and extended version of the Mulliken electronegativities. Describes applications and limitations implied by this version. (CW)

Discusses a revision and extension of the Mulliken electronegativity scale to consider 50 elements. Describes the calculation of valence-state promotion energies and Mulliken atomic electronegativities and the conversion of Mulliken electronegativities to Pauling units. (CW)