Presents a quantitative treatment of ionization potentials of isoelectronic atoms. By looking at the single-electron view of calculating the total energy of an atom, trends in the screening and effective quantum number parameters are examined. Approaches the question of determining electron affinities. (CW)

Reviews a noncommercial educational game (Polymerlab) and changes made in GASLAWS (adaptation of mainframe program used in computer-assisted instruction). Describes programs on simulation of molecular speed distributions; interfacing microcomputers to make laboratory measurements; a course in microcomputer-instrument interfacing and measuring and…

Provided are procedures and list of materials needed to demonstrate that the pressure inside a container with a porous surface can be changed due to the rate of diffusion of low molecular weight gases. Typical results obtained are included. (JN)

Describes the collisional properties as a logically essential component of the ideal gas model since an actual intraparticle process cannot support observable anisotropic velocity distributions without collisions taken into account. (CC)

Five atomic theory activities feasible for high school students to perform are described based on the following models: (1) Dalton's Uniform Sphere Model; (2) Thomson's Raisin Pudding Model; (3) Rutherford's Nuclear Model; (4) Bohr's Energy Level Model, and (5) Orbital Model from quantum mechanics. (SK)

Discusses concept of covalent bonding as related to homonuclear diatomic molecules. Article draws attention to the existence of bound rare gas and alkaline earth diatomic molecules. Summarizes their molecular parameters and offers spectroscopic data. Strength and variation with distance of interatomic attractive forces is given. (Author/SA)

Describes a simple and graphic demonstration of molecular motion that utilizes a hot plate, a beaker, tap water, India ink, and a Pasteur pipette with a rubber bulb. Provides tips on guiding students to an understanding of molecular motion using this demonstration. (DDR)

Describes a first-year course in General Chemistry that incorporates the principles of active engagement and the learning cycle paradigm. Recommends student small-group instruction and guided-inquiry laboratory investigations. (WRM)

Explains how population growth can be used to illustrate the concepts of chemical kinetics. Provides an illustration of how one can use concepts and mathematics to take information that is known and obtain a result that is not initially obvious. (DDR)

The use of participatory lecture demonstrations in the classroom is described. Examples are given for the following topics: chromatography, chemical kinetics, balancing equations, the gas laws, kinetic molecular theory, Henry's law of gas solubility, electronic energy levels in atoms, and translational, vibrational, and rotational energies of…

Explains using the linear combination of bonding orbitals methods; why two different diagrams are used to represent the molecules when the properties of homonuclear diatomic molecules are being discussed. (GA)

Reviews determination of atomic weights. (SL)

Reviews the study of molecular shapes and structures. (SL)

Reviews the topic of atomic, molecular, and ionic size. (SL)