This database provides access to information on every crystal structure published in the American Mineralogist, the Canadian Mineralogist, European Journal of Mineralogy, and Physics and Chemistry of Minerals, as well as selected datasets from other journals. The data are searchable by mineral name, author, chemistry, cell parameters and symmetry, diffraction pattern, and a general search. There are also lists of minerals represented in the database and authors of publications cited.
This resource allows you to customize and generate chemical equation balancing worksheets for testing or student practice.
The ChemWiki project is a new approach toward chemistry education where an open access textbook environment is constantly being written and re-written partly by students and partly by faculty members resulting in a free chemistry textbook to supplement or supplant conventional paper-based books. Anyone can view, although a freely available account is required to edit the site modules.
This database provides information on thousands of chemical compounds, including synthesis references and physical properties. The database is searchable by keyword and browseable by journal title. For each compound, the information includes molecular formula and weight, Chemical Abstracts Service (CAS) numbers, International Chemical Identifier (InChIKey), and Simplified Molecular Input Line Entry System (SMILES) notation. There is also information on synonyms, physical properties (boiling and melting points, density), an illustration of chemical structure, spectral data, and links to additional data.
A web resource that contains Chemical Abstracts Service (CAS) Registry Numbers for approximately 7,800 chemicals of widespread general public interest. Common Chemistry is helpful to non-chemists who know either a name or CAS Registry Number® of a common chemical and want to pair both pieces of information.
This database, part of a college-level chemistry course, provides information on hundreds of compounds, elements, and substances encountered in introductory chemistry courses and in everyday life. The informaion includes chemical synonyms, molecular weights, structures, equilibrium constants, thermodynamic properties, and common uses, with properties presented in a variety of common units. Structure information includes flat structural formulas, ball and stick models, electron density/electric potential maps, and Chime "live" structures that can be rotated and queried for bond lengths, bond angles, and torsion angles. The site also includes links to the course website, a glossary, a frequently-asked-questions feature, information on sources used in constructing the database, and many other resources.
ElectroSim 2.0 is a collection of theory-based interactive simulations of simple electronic circuits, suitable for a course in elementary practical instrumentation electronics; the simulations were created for use in an "Electronics for Chemists" course at the University of Maryland. Available for free download, the software can be used on Macintosh or Windows computers (a special utility is required to run it under Windows). Over twenty common analog circuits are included in the package. For each simulation, properties such as voltage, resistance, current, and capacitance can be changed to see how particular circuits behave under different operating conditions. There are easy to follow instructions and simple controls.
This collection of interactive computer models and simulations of common instruments and techniques used in analytical chemistry is available for free download. The software can be used on Macintosh or Windows computers. Most of the models have a point-and-click interface; users click buttons and drag sliders to control variables, and the models respond dynamically. They were designed to be used by individual students either as homework assignments, for in-class use in a computer lab environment, or in the laboratory for the analysis of student-generated data. Some of the models can be used by the instructor in lecture-demonstration environments. Most of them come with student assignment handouts attached. The mathematical basis for each model is described, including all cell definitions and equations.
This 26-page illustrated introduction to digital signal processing in chemical analysis covers signal arithmetic, signals and noise, smoothing, differentiation, resolution enhancement, harmonic analysis, convolution, deconvolution, Fourier filter, integration and peak area measurement, and curve fitting. It is accompanied by signal processing software for Macintosh with reference manual and tutorial (available for free download), video demonstrations, and Matlab signal processing modules for Mac, PC, and Unix.
Middle school science resource from ACS. It includes activity-based lesson plans for teaching basic chemistry concepts that cover all the main concepts in middle school chemistry. Each lesson also contains integrated animations and video that a teacher can use to help explain student observations on the molecular level. Online professional development will also be available to introduce and familiarize teachers with the demonstrations, activities, and chemistry content in the site.
NanoSpace, a free website developed by the Rensselear Polytechnic Institute, was created to increase science literacy utilizing an amusement park. NanoSpace is designed to teach science to elementary and middle school students through more than 25 games and animations that entice kids to learn more about atoms and molecules in NanoSpace. Visitors can try to beat the clock in the Periodic Memory and click-and-drag atoms to construct molecules in "Build `Em." Answer multiple-choice questions in "Who wants to be a Quidecillionaire?," and hope the answer is correct before you fall down to the bottom rung again.
This tutorial provides instruction on Pauli's exclusion principle, formulated by physicist Wolfgang Pauli in 1925, which states that no two electrons in an atom can have identical quantum numbers. Topics include a mathematical statement of the principle, descriptions of some of its applications, and its role in ionic and covalent bonding, nuclear shell structure, and nuclear binding energy.
This site is a collection of web-pages designed to support an integrated treatment of related topics from organic, inorganic and biochemistry. The topics are organized around common principles of structure or reactivity.
The Students' Guide describes and recommends free software for chemical applications. These programs are designed for the professional, but are suitable for students in AP chemistry and above. Applications include structure drawing, visualization, properties of organic molecules, aqueous equilibria calculations and chemical safety. Tutorials are included for some programs.