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- Images representing atomic orbitals and molecular orbitals
- Animated plots of wave functions
- Animated plots of electron density
- "Dot-density" plots of electron density
- Plots of radial distribution functions
Atomic Structure
WebElements Periodic Table: Information and pictures about elements in the table.
Chemical Elements: An online periodic table with additional information
The Orbitron: a gallery of atomic orbitals and molecular orbitals on the WWW
Atomic Orbitals: shapes of orbitals and an orbital viewer program
Pictures of atomic orbitals: Here are some renderings of the real ('Cartesian') representations of the atomic orbitals of a one electron atom. The surfaces represent a contour of equal probability amplitude.
Electronegativity: This page explains what electronegativity is, and how and why it varies around the Periodic Table.
Electron Affinity: This page explains what electron affinity is, and then looks at the factors that affect its size. It assumes that you know about simple atomic orbitals, and can write electronic structures for simple atoms.
Aufbau Principle: This page lets you visualize the "building up" principle for elements through Zn.
Ionization Energy: View the periodic nature of the ionization energy in this hyperphysics site.
Atmospheric Gases
The 2007 reports on the warming of the atmosphere due to increases in the concentration of CO2 are available on the web page for the Intergovermental Panel on Climate Change.
Hydrogen in the Visual Elements. This website by the Royal Society of Chemistry links to other elements as well.
The Hydrogen Economy from "How Stuff Works" website discussed the advantages of the hydrogen economy over the fossil fuel economy. This is a very simplified picture of hydrogen as fuel. A better, though still general article on this subject is...
The Hydrogen Economy from Physics Today. This covers hydrogen as an energy carrier and some fuel cell information.
The Schatz Energy Research Institute has a great animation on a hydrogen fuel cell. The Proton Exchange Membrane Fuel Cell Animation This shows what goes on inside an individual fuel cell.
The Ozone Hole Tour, from the Center for Atmospheric Science of the University of Cambridge, discusses, history, science, and current research related to ozone loss in the stratosphere.
The EPA also has a nice page on the Antarctic Ozone Hole with satellite images.
The EPA has a site on indoor air quality with information on radon and its effects on health.
Smog City is an interactive air pollution simulator that shows how your choices, environmental factors, and land use contribute to air pollution.
AirNow is an EPA site that discusses the health effects of smog.
The International Global Atmospheric Chemistry Project at NOAA has a site on Tropospheric OH: In the beginning.
Warwick Hiller at the Australian National University has a site on molecular oxygen
Chemical Reactions in the Atmosphere is a web page from an Environmental Chemistry course by Richard Foust and Vincent Anigbogu at Norther Arizona University.
Molecules
Purdue has a nice tutorial on VSEPR.
The University of Sheffield has an even more complete tutorial on VSEPR with lots of examples.
You can find character tables for chemically important point groups at this site.Point Groups
The "Introduction to Molecular Orbitals" site includes atomic orbitals, and simple molecular orbitals, The molecular orbital diagrams for oxygen, nitrogen, methane, ammonia, water, and many other simples molecules are posted here.
Introduction to Molecular Symmetry. The University of Hull, UK, has an excellent web page on molecular symmetry. This is a MUST READ if you are having any trouble with this topic. It is both clear and comprehensive.
Exercises in Point Group Symmetry. This page requires Chime. It shows rotations and construction of point groups.
Earth
The Mineral Gallery is a commercial site with a growing collection of mineral descriptions, images, and specimens. You can search by name or type.
This site from the Franklin Institute on rocks and minerals has links to chemical formulae, composition, crystal structures, etc.
Bonding in solids such as metals, insulators and semiconductors may be understood most effectively by an expansion of simple MO theory to assemblidges of scores of atoms.
Great pictures of cubic and hexagonal close packed structures are on this site.
Structure of Inorganic Solids; These are four lectures by Dr. S. J. Heyes at Oxford University.
There is an excellent explanation of semiconductors on the web. You should read "Summary of Basic Properties of Intrinsic and Extrinsic Semiconductors". The hyperphysics site has a section on semiconductors that includes band theory of solids.
What are zeolites? This is a very brief summary of the applications of zeolites.
Dr. M. Hewat at the Institut Laue-Langevin has excellent pages on the atomic structure of materials. This includes:
Metal Structures. This page decribes the structure of metals, and relates that structure to the physical properties of the metal.
. Superconductors, following the path of least resistance. This site provides information on superconductors for beginning students.
Water
Ice structure by Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay. Water Structure and Behavior by Martin Chaplin. This page give comprehensive information on liquid water (H2O).
H2O - The Mystery, Art, and Science of Water by Professor Jill Granger of Sweet Briar College. This page contains basic information on the chemistry of water, electrolysis, and properties.
Coordination compounds and ligands. This general site is from Purdue University.
Spectroscopy and Bonding
Learn the basics of UV-visible spectroscopy as it relates to molecular structure at this site from the University of Sheffield.
Introduction to Molecular Orbital Theory. This collection of web documents can be used as a "backup" to Henry Rzepa's on-line Pericyclic Chemistry course. It uses 3-D pictorial presentations of molecular orbitals to elucidate organic reaction mechanisms - such as those found in pericyclic chemistry.
Polyatomic Species: Molecular Orbital Theory Using the linear combination of atomic orbitals (LCAO) methodology, methane is constructed by overlapping the carbon's one 2s and three 2p AOs with the four hydrogen 1s AOs.
Dielectric Constants