Universal Algorithm for Acid-Base Equilibrium Calculations
Excel workbooks to facilitate calculations of equilibrium concentrations.

Interactive Molecular Orbitals
An interactive approach to the molecular orbitals of heteronuclear diatomic and polyatomic molecules.

 

Atomic Spectra

Atomic Spectra
A Flash animation depicting the atomic emission spectra (400-700nm) of eight different elements.

Balmer Series
This animation briefly introduces the basics of the emission spectra of one-electron atoms and ions.

Bohr Hydrogen Atom Emission Series
Students can use the interactive arrows to explore various series in the hydrogen spectrum.

Interactive Spreadsheets
Interactive Excel spreadsheets display hard-to-understand concepts in statistics, quantum mechanics, physics, and more.

Packing of spheres in crystal lattices

Close Packing of Layers of Spheres
Explore close-packing layer options.

HCP Layers
Views from both the top and side of three layers of spheres are arranged in a hexagonal close-packed array.

Gold Layers
Transparent views of tetrahedral and octahedral holes.

Lattice Energy
A PowerPoint presentation of the concept of lattice energy at the introductory and intermediate inorganic chemistry level.

Visualizing numerical methods

Visualizing Numerical Methods
This is a collection of movies designed to help students visualize various numerical approaches to evaluating functions or solving equations.

Quadratic
Shows how the roots of a quadratic change as the b term in the equation changes.

Tangent Curve
Compares the slope of the tangent line to the value of the derivative obtained using symbolic differentiation at various points along a particular function.

Numerical Integration
The integral of a function is obtained by summing the areas of a number of rectangles, and then is compared to the value of the integral obtained using symbolic integration.

Newton-Raphson
An introduction to the Newton-Raphson method for evaluating the root(s) of a function.

Newton Test
Demonstrates the Newton-Raphson procedure.

Photoelectric effect

Simulations of aspects of the photoelectric effect
This is an animation of the experiment with four choices of incident radiation.

 

Raman spectroscopy

Interactive Raman Spectroscopy
A tutorial designed to introduce the basics of the vibrational Raman effect.

 

Atomic and molecular orbitals

Interactive Electron Configurations
Students drag electrons onto energy levels to construct electron configurations for atoms up to atomic number 18 (Ar).

Interactive Molecular Orbital Diagrams
A similar application for constructing the molecular orbital electron configurations of heteronuclear diatomic molecules.

Atomic Orbital Shapes
View 3-dimensional representations of hydrogenic orbital surfaces that are rotatable and scalable.

Shapes of d Orbitals
View the d orbitals in an axis set. Running the mouse over an orbital reveals the "name" of that orbital.

d orbitals in an Octahedral Ligand Field
View the d orbitals in an octahedral ligand field. The user may also click on the name of any one of the d orbitals to obtain a larger 3-dimensional image.

Heteronuclear Diatomic Molecular Orbital Formation
A set of movies that demonstrates heteronuclear diatomic molecular orbital formation.

Interactive π-Bonding Effects
Study the effect of π bonding on octahedral, one-electron, ligand field splitting.

The radius ratio concept

Radius Ratio
A set of animations that demonstrates properties of the spherical holes formed when uniform spheres are packed.

Microsoft® Excel tutorials

Generating a Trendline
A tutorial.

Generating a Histogram
A tutorial.

Collection of molecular structures

Chime Library
Chime files for many molecular structures.