General Chemistry

ChEMystery - An Interactive Virtual Text Book
Biochem Net: General Chemistry - Links to various reference materials amd interactive tutorials, as well as including interesting articles such as "Chemistry & Autumn Colours", "Cosmetics", and "Experiments you can do at home"
General Chemistry: a Virtual Textbook - Contains material for a first semester undergraduate course in general chemistry (most of which is relevant for A-Level students), and developed from the first eleven chapters of "Chemistry: the Central Science" by Brown, Lemay and Bursten

Atomic Structure and Chemical Bonding

VSEPR: Valence Shell Electron Pair Repulsion - Good site for revision with explanation of what VSEPR is and its rules, since plenty of examples and practices are given, as well as the ability to compare different structures
VSEPR: Site from University of Sheffield - Provides a VSEPR calculator to help predict the geometry of molecules containing a central atom with different groups attached

The Ideal Gas Laws - Maintained by R. H. Logan (Instructor of Chemistry, El Centro College), notes, questions, and solutions on various aspects of the gas laws are provided

Chemical Thermodynamics - Topics covered are not in A-Level syllabus, but its content is good for 'S' paper students who are interested in a brief but ample introduction to entropy

Oxidation/ Reduction - A joint project between Kapi'olani Community College's Naio Educational Media Center and Leeward Community College's Chemistry Department, tutorials that covers many phases of redox chemistry including everyday examples such as photosynthesis and dry cell bacteries are provided on this page

Periodic Table of the Elements - This site from the Los Alamos National Laboratory has information (history, sources, properties, uses, costs) on all the different elements of the Periodic Table, and also includes a short article on how to name new elements
Chemicool Periodic Table - This site from Chemicool gives a brief summary of the characterics and reactions of the elements
The Pictorial Periodic Table - This is a growing database, searchable by text or property and maintained by the Phoenin College, which allows you to plot out graphs of properties such as melting points and ionisation potential versus a specified range of atomic number, as well as providing the Periodic Table in various presentations
The Periodic Tables of the Elements on the Internet - Besides information on the various elements, this site also provides links to other sources of information about the element
Web-Elements - Simple yet comprehensive coverage of elements of the Periodic Table, with a very comprehensive information database maintained by the University of Sheffield besides providing graphs comparing radius and electronegativities

Biochem Net: Organic Chemistry - Links to various reference materials, tutorials and experiments, as well as interesting articles on DDT, buckminsterfullerene, and coffee
Organic Webcards - Summary cards f various reactions, although some are beyond A-Level syllabus, with the ability to hide reactants, products, or reagents in order to test yourself
Graphical Organic Reaction Summaries - Useful summary of the reactions/synthesis of different homologous series, although some are out of A-Level syllabus
Undergraduate Organic Chemistry at UCONN - Organic Chemistry Exam Questions and answers, from simple to beyond A-Level syllabus (Difficult questions can be attempted by S-Paper students)
Organic Chemistry Online - Comprehensive notes on Organic Chemistry with multiple-choice questions pitched higher than A-Level syllabus
Alkenes: Addition and Oxidation Reactions - Informative notes on alkenes

ChemTeam - Brief notes and tutorial on various High School Chemistry topics, with additional humour and National Chemistry Olympiad questions
Soil - Read more about soil in Hawaii
Stratopheric Ozone Depletion - Resource file on ozone depletion