This reference consists of an interactive periodic chart that provides information for most of the elements. Clicking on an element's symbol on the chart accesses the element's name, discoverer and date of discovery, as well as its uses. There is also information on the appearance, Chemical Abstracts Service (CAS) number (a unique identifier assigned to every chemical that has been described in the ... Full description.

The Macrogalleria is dedicated to the science of polymers. A polymer is a large molecule, often containing many thousands of small molecules joined together chemically to form one giant macromolecule. The site is divided into five education levels based on the nature of the material. Level one, 'Polymers are Everywhere', illustrates where polymers are found in everyday life. Resource users can visit ... Full description.

This site utilizes an unconventional approach to the identification and recollection of the periodic elements. Each element is linked to one or more comic strips, which makes reference to the particular element of interest. Instructors will find this site useful for visual aides. A site-specific search allows resource users to pinpoint the perfect "elemental" comic. Regular site visitors are informed ... Full description.

This lesson will help students gain experience in asking questions and conducting inquiry by exploring the separation of colors in water and other solvents; and to communicate and share findings of student investigations. The lesson uses a technique called paper chromatography, which is demonstrated using water, ink, and a coffee filter. Scientists use chromatography frequently to separate and identify ... Full description.

The colligative properties of solutions consist of freezing point depression, boiling point elevation, vapor pressure lowering, and osmotic pressure. These properties ideally depend on changes in the entropy of the solution on dissolving the solute, which is determined by the number of the solute molecules or ions but does not depend on their structure. This resource presents the derivations of the ... Full description.

In this site, Martin Chaplin has brought together a selection of ideas concerning the complex behavior of water in hopes of encouraging both the understanding of water and further work. Some of the many ideas presented are: the structure of water, water anomalies, hydrogen bonding, the phase diagram of water, and water hydration. Full description.

These materials and documents are typical of those presented in an undergraduate course in general chemistry, analytical chemistry, and analytical instrumentation. Resources for educators include Excel spreadsheet simulations for analytical and physical chemistry, prototype JavaScripts and PERL scripts, lists of web workshops and publications, and links to the most recent papers and presentations ... Full description.

From pyroclastic compounds to natural hormones and common drugs, this site features detailed chemical information on various molecular compounds. Each month a new molecule is added to the list. Molecule pages connect to either a University Chemistry Department or commercial site in the United Kingdom, the United States, or anywhere in the world. Most descriptions include a history of use, chemical ... Full description.

This lab activity is designed to teach students how to test for pH and understand its relationship to them and their environment. They will learn what pH is, draw and label a pH scale, measure the pH of various items, and explain why it's important to understand pH, for example, the danger presented by substances having very high or low pH. Full description.

This webpage presents a periodic table, containing physical data, chemical properties, health and environmental data of all chemical elements. It is available in English, French, German, Spanish, and Dutch. Full description.