Chemistry 

• American Chemical Society
  Tons of information for chemistry students, teachers, and professionals.
• Britannica: Chemical Element
  Encyclopedia Britannica article on the chemical elements.
• Build an Atom
  Simple graphical tool showing the increasing complexity of atoms as one moves through the periodic table.
• Chem Spider
  Search engine for "aggregating and indexing chemical structures and their associated information into a single searchable repository" (Formerly 'ChemRefer'.)
• Chem1 Virtual Textbook
  Free online textbook from a retired college professor.
• ChemDex
  Vast collection of annotated chemistry link from all over the world, organized by subject.
• Chem4Kids.com
  "Information on matter, atoms, elements, the periodic table, reactions, and biochemistry" for both children and adults.
• Chemical & Engineering News
  While arcives are accessible by subscription only, the recent magazine issues and current news section of the website are free.
• Chemical Crossword Puzzles
  Test your knowledge of chemistry terms with these puzzles!
• A Chemical Jigsaw Puzzle
  "Can't learn chemical reactions? Don't know how combining powers work?" This jigsaw puzzle will help you out.
• Chemistry and Biology Pictures
  "This photo gallery is designed to assist those who need high quality science pictures for lectures, demonstrations, and other projects."
• ChemTeam: A Tutorial for High School Chemistry
  "The ChemTeam provides study resources in all standard topics for students in high school and Advanced Placement chemistry."
• Creative Chemistry
  Hundreds of pages of worksheets and study notes for chemistry.
• Cyberspace Chemistry
  Online reference materials for college chemistry courses.
• General Chemistry Online
  Introduction to general chemistry, with hyperlinked notes and guides, FAQS, glossary, exam guide, quizzes, toolbox with periodic table and calculators, and extensive links.
• Interactives: Periodic Table
  A step-by-step introduction to the periodic table with an interactive quiz section at the end.
• Introduction to Chemistry
  Lessons from an introductory college chemistry course.
• Mole Day & National Chemistry Week  Chemical Achievers Chemical Heritage Foundataion Chemistry in the Kitchen ChemTeam: The Mole National Chemistry Week National Mole Day Foundation This Week in Chemical History Why Use Moles
• Molecular Movies
  "This web resource presents an organized directory of cell and molecular animations, as well as a collection of original tutorials for life science professionals learning 3D visualization."
• Molecule of the Month
  Information from colleges and commercial sites about different molecules.
• Molecules in Motion
  Java applet from U.C. Berkeley.
• OpenChemistry
  "The purpose of OpenChemistry is ... creating a community of educators, students and lifetime learners who are interested in producing and consuming original content in chemistry."
• VSEPR
  "Valance Shell Electron Pair Repulsion ... An Interacive Tutorial & Quiz."
• WebElements
  Choose either the Professional or Scholar (student) version of the table of the elements, and click on any element to find out information about it.
• What's That Stuff?
  "Ever wondered about what's really in hair coloring, Silly Putty, Cheese Wiz, artificial snow, or self-tanners? C&EN presents a collection of articles that gives you a look at the chemistry behind a wide variety of everyday products."
• World of Materials
  Information on materials science and engineering, including alloys, ceramics, polymers, semiconductors, and other concepts.

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