Searching the Help To search for information in the Help, type a word or phrase in the Search box. When you enter a group of words, OR is inferred. You can use Boolean operators to refine your search. Results returned are case insensitive.

However, results ranking takes case into account and assigns higher scores to case matches. Therefore, a search for 'cats' followed by a search for 'Cats' would return the same number of Help topics, but the order in which the topics are listed would be different.

Web-based resources for General Chemistry - a collaborative approach toward chemistry education where an Open Access textbook environment is constantly being written and re-written by students and faculty members resulting in a free Chemistry textbook to supplant conventional paper-based books. The material is organized into sections for analytical, biological, inorganic, organic, physical and theoretical chemistry. Each of these contains topics ordinarily included in 'general' chemistry, as well as more advanced ones that go beyond first-year college level. an interactive guide and Web resource for students and teachers of introductory college chemistry, maintained by Fred Senese of Frostberg State University (MD). A well-organized wealth of material, including collections of notes and guides for introductory General Chemistry, skills checklists and online self-grading examinations, and a Q&A column. an online version of a text by Mark Bishop of Monterey Peninsula College (CA).

It is intended primarily for students in beginning chemistry courses. ($20 'donate-ware', and well worth it!) - this nicely-done site by Charles Ophardt of Elmhurst College covers a wide swath of general, organic, and environmental chemistry. The text material is interesting and well written without attempting to be encyclopedic. a free collection of comprehensive, in-depth treatments of various topics, intended to supplement or replace conventional textbook treatments.

It is aimed mainly at the first-year college level, but advanced high school students will find much of it useful. (Steve Lower, Simon Fraser University) - this extensive, excellent and comprehensive site by Mark Leach tells how chemistry emerges from the Periodic Table and bifurcates into the rich and extraordinary science that we know and experience. a summary of the major collections, including the Khan Academy, and those done by various teachers, mostly at the high school level. Many topics in general chemistry are covered here, and are worth looking at. But as in any 'wiki-' type project to which anyone can contribute, the quality is variable, and the visual design is primitive. a large collection of pages on matter (including quantum theory), physical chmistry, electrochemistry, and aqueous solutions.an Australian 'science education site being developed by experienced teachers.' They offer tutorials, texts, games, drills to registered members, as well as an extensive collection of tutorials for non-members.

I believe GitHub doesn't actually send the correct URL until you've logged in to your account using GitHub for Mac at least once. Once you've logged in with that account in GitHub for Mac once, they will set that flag for your new user and you'll get the clone URLs that SourceTree can then intercept. I believe they do this to try to detect that you've got GitHub for Mac installed before giving you the apporpriately formatted clone URL. They store this flag per user account which is why it's stopped working when you created a new account. Unfortunately we have no control over this because they choose when to expose the clone URL for you to click. Interview questions github.

this site maintained by Ron Rinehart of Monterey Peninsula College contains a wealth of material oriented toward chemical education, all well organized in a visually-attractive way. a comprehensive collection of tutorials from the Chemical Education Digital Library - an excellent compendium of Chemistry- and Science-related data, in many ways more comprehensive than the Handbook of Chemistry and Physics, and certainly more convenient to use. Should be bookmarked by every serious Chemistry student! The has links to practice problems and tutorials on various topics. This hypertextbook by Ken Koehler is nicely organized and is the ideal place to go when your Chemistry textbook lets you down. sound advice that is widely ignored.

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- this extensive collection of links at Bob Jacob's Wilton HS site apparently disappeared in early 2008, but this link to a 2007 archived version should still be useful for both high school and college-level General Chemistry. part of Carmen Giunta's (Le Moyne College) excellent, 'This Week' presents mini-timlines covering the current two-week period. this site by David Trapp organizes the elements according to whether their names are derived from celestial objects, places, minerals, etc. Discovery of the elements - provides very brief summaries; the offers more comprehensive historical information. some practical advice for those addicted to 'plug-and-chug'. This About.com site has a fair selection. solid advice from a Georgetown University prof.

By veteran teacher Mark Rosengarten. A collection of notes and worksheets in pdf format in two 13-unit sets, one for honors, and the other for Regents Chemistry.

Each unit begins with a nicely-organized set of definitions and notes, and contines with worksheets that can serve as student homework. Although directed at the high school, these materials can serve as a good review for college chemistry students. Notes and practice problems on a large number of topics.

'is a free chemical structure database providing fast text and structure search access to over 58 million structures from hundreds of data sources.' Videos for General Chemistry There are now problably thousands of these on YouTube and other sites — far too many for one person to review, let alone to keep up to date. In 2013, I created a that I considered worth recommnding to others.

General review/revision site for UK GCSE, AS and A2 chemistry and USA/Canada grades 9-12. Revision notes, multiple choice tests, structured questions, graphics and extensive links to useful and interesting CHEMISTRY sites. One site speciallity is the structure and naming of organic compounds. Is a high school course support page of enclyclopedic proportions. Authored by Bob Jacobs of Wilton High School, this well-organized site contains hundreds of links that will be of interest to students at both the high school and first-year college levels. This new site consists of a series of interactive quiz-based tutorials.

There are also some laboratory simulatons. Registration is required, but is free. Covers a variety of topics - aimed mainly at HS and AP Chemistry. The - Tutorials for High School Chemistry in all standard topics for students in high school and Advanced Placement chemistry., - 'A Virtual Textbook' and a reliable set of lecture notes covering a complete college-level course by Michael Blaber of Florida State U. Look in the left-hand frame to see what topics are available.

Is a chemistry hypertextbook in the form of a large set of HTML files that users download and then view with their Web browsers off-line. It is organized in an interesting way, and is intended to support users having a wide range of backgrounds and capabilities, including home-schoolers and adult learners. There is a nominal charge for downloading the material.

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a nice set of lessons and reference materials by Greg Curran of Fordham Preparatory School. a well-organized and understandable set of Web pages covering quantum mechanics and its applications, including such practical ones as cat scans and microwave ovens. Well worth a look! Has some nice General Chemistry tutorial pages. a collection of interative web-based chemistry tutorials.

The tutorials employ Physlets and Chemistry Applets to simulate experiments or depict molecular and atomic structure. Topics include equilibria, kinetics, coordination chemistry, and crystal structure. (David Blauch, Davidson College). Do chemical bonds really exist? Nobody has ever 'seen' one, so the best we can do is construct models.

Here is a brief summary of those you should know about. Coming to terms with covalent, ionic, and metallic bonding, and with mixtures thereof. Guaranteed to give you more insight to this than your textbook does! How can those electron-dot diagrams showing shared electrons happily sitting between the nuclei be consistent with the principle that opposite charges attract?

The model described here is the simplest one that really explains bonding, but you are unlikely to find it in any textbook! This summary with easy access to many images is a hypertext version of the chapter on this subject from a textbook by Mark Winnter (U Sheffield). This Purdue University site features a useful set of practice problems and requires the downloadable plug-in.

Electrochemistry - An in-depth, comprehensive treatment (Steve Lower) (Ralph Logan) (1997-2004) by J. Baird of Brown Univ. Gases - a six-part 'virtual textbook' treatment of the gaseous state of matter by Steve Lower. Includes numerous examples of application of kinetic molecular theory and a section on real gases.

(Part of the ) Intermolecular forces - this tutorial for first-year students looks at ionic-, van der Waals attractions, and the universal repulsive force, and how these lead to potential energy curves. (Part of the ) Kinetics - An introduction to rates of reaction, rate laws, half-life, activation energy, the Arrhenius equation, and reaction mechanisms.

Chung Chieh's at U of Waterloo (Canada) includes test questions with answers. an introduction to the study of chemical kinetics based on the exploration of dynamic phenomena.

Includes some good simulations. Olaf College) from Gary Bertrand. (WPI) is college-level with problem examples (≤ 2009). This excellent page from Purdue U. Contins links to guides for solving many of the typical quantitative problems encountered in General Chemistry. If your instructor doesn't have the answer, try here!

Conducted by Fred Senese of Frostberg State Univ ersity (MD) as part of 'Project Antoine'. an online community for science, math and computer science teachers and students.

NEWTON is operated. A large collection of free practice tests covering many topics at the AP level. Is a Yahoo group where you can ask (or answer!) questions. a place where you can post questions and answers.

There are separate forums for high school chemistry, college general chemistry, organic, analytical, physical nuclear and inorganic chemistry, and chemical biology, as well as others of more general interest. Registration is required, but it is free. Is another site on which you can post questions and answers relting to General Chemisry and biochemistry as well as organic, theoretical and computational chemistry. Is another board for 'chemistry help' with practice exams, textbook excerpts, and user-posted questions. yet another site for chemistry questions and answers - You can use this WyzAnt site to search for local tutors, review profiles and qualifications, run background checks, and arrange for in-home lessons.

Chemistry humor - from the archived collection of Mr. Seiler, an Illinois high school teacher. guaranteed by the American Chemical Society to make you laugh.: an archive of largely satisfactory science cartoons from 'Nick' (including over 200 on Chemistry) (≤ 2009) - an amusing and informative site by Paul May of Bristol U (UK) that will likely have special appeal to teen males of all ages. some of it is pretty corny.

this bit of wisdom was found on the Marshall U. — taking the periodic table a bit too far! ( dihydrogen monoxide) page. It can kill you!

All about this nefarious chemical in our environment. one of Mark Wutka's WeirdWorks stories - this U Pittsburgh site covers general, organic, analytical and biochemistry. Chemistry-related apparel and accessories Show the world that chemistry matters to you!

Here are a few U.S. Suppliers of periodic table T-shirts and other great conversation-starters. Offers some nice chemistry, biology and geology T-shirts. Has a good selection of PT neckties (cheaper) and scarves.

Has a wide selection of, some pretty corny. This scientist-turned artist with a fascination for molecules offers molecule-themed silver jewelry, keychains, baby gifts, holiday cards— and, for the guys, testosterone boxer shorts.

Is an interactive chemistry resource and learning tool developed for the Mac by Bitwixt Software Systems. Used by educators, students, scientists, and the simply curious. With its 3D Molecule Library, and its 3D models of atomic orbitals, molecules, compounds, gases, and crystals, The Atomic Dashboard helps you explore the relationships between the behavior of atoms and molecules and their 3D structure.

Mac App Store, $15. Freeware for pH and acid-base equilibrium calculations and for simulation and analysis of Potentiometric Titration Curves - this downloadable, Windows-only program will balance almost any chemical equation for you. Is a shareware periodic table-oriented database including isotopic and nuclear data) on the elements. Also includes a molecular weight calculator.

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Is a Macintosh shareware application that displays atomic orbitals in real-time. Is also an interactive Periodic Table and 3D Atom Modelling program. $20 and for Windows only. Page lists a number of Chemistry applications, including open source, freeware and shareware - now Free!

This set of lessons that provide guided, interactive instruction in General Chemistry at the college and advanced high school levels.These materials are suitable for home study or as a supplement to a formal course. All lessons start at a very elementary level, and many of them go somewhat beyond the content of the standard first-year course, making them useful to students enrolled in analytical chemistry, biochemistry, and environmental chemistry courses. Windows 3.1 throuhgh XP. Calculates the pH of any mixture of strong/weak/polyprotic acids and bases, with or without ionic strength or ativity corrections, and can draw titration curves. It also contains an extensive database of acid/base data.

Chemistry structure-drawing software is a free Windows-only application that you can use it to draw chemical structures and export them for viewing as 3D models. Symyx Draw is a successor to which is no longer available. Is a free-for-noncommercial-use application for Windows or Linux that offers 3D optimization, viewing and rotation, cut and paste into other applications, and tautomer prediction. 'is the industry standard software used by scientists worldwide to draw accurate, chemically-aware structures for use in database queries, preparation of publication-quality graphics, and entry for modeling and other programs that require an electronic description of molecules and reactions.' Versions are available for both Windows and Mac-OS, and a deep discount is available to students. Is a free multi-platform GPL program that draws publication-quality structures.file:///Users/slower/Web/ChemEd/genchem.shtml is a free molecular visualization application for Mac OS X operating systems.

IMol supports several file formats. It can easily handle small and large molecules, loads multiple molecules, can move and rotate them independently, or displays a molecular dynamics trajectory. Sources of free molecular modeling software are listed at the - from the Journal of Chemical Education's JCE Software series is now available.

The catch: it is pre-Windows (DOS), but some of it is quite good. Offers student discounts on all its products which include a number of titles in General Chemistry. Utility calculators for Chemistry Students: you would be wise to avoid depending on these utilities for routine in beginning courses; you really need the practice in working these problems out for yourself! Is a free molecular weight calculator Windows-only utility by Davd Defoort. You type in the formula, and it returns themolecular weight. By Matthew Monroe (Windows only) from Lenntech MW calculators for Macintosh OS X: (includes built-in periodic table reference) - iPhone/iPod MW calculator: -Online solution calculators:; - All-in-one freeware for pH and acid-base equilibrium calculations and for simulation and analysis of Potentiometric Titration Curves. Is a real-time 2-D simulation of a chemistry lab in which the user interacts with animated lab equipment in a large number of experiment modules (.) An inexpensive version is available for about $25.

Macintosh and Windows; Free demo available by download. Is a full-featured molecular modeling and visualization tool designed for personal computing platforms. It was developed with NSF support and is available to students at a very low price. Both Macintosh and Windows versions can be downloaded. The latest version incorporates many advanced features only found in expensive workstation-based modeling packages.

Novice users are able to quickly generate models, view them form any perspective, create reaction animations, and save all data to disk. For Chem junkies only! Is a huge (200 Mb) collection of information about chemical reactions, phase changes and radiochemistry organized into a relational database.

It is free for personal use and available in both Windows and Macintosh versions.