This lesson introduces atomic theory from Democritus to Dalton and reviews John Dalton's 4 basic theories on matter. This serves as the first lesson in a series on atomic structure. Full description.

This module provides an introduction to the chemical properties of water. The dipole across the molecule, hydrogen bonding, surface tension,and solvation are all introduced. Full description.

In this activity, which can be performed as a demonstration by the teacher or by the students themselves, carbon dioxide is generated in a fish tank using sodium bicarbonate and vinegar. The students can observe as the accumulating carbon dioxide extinguishes candles of different heights, marking rising levels of CO2 in the tank. They can also blow soap bubbles (which contain air) into the tank and ... Full description.

In this demonstration, the teacher will use a potato and hydrogen peroxide to generate oxygen in a closed environment. Students can then observe its effects on a burning wooden splint and on burning steel wool. They will understand that a large amount of energy can be released by the process of oxidation. As an extension, the teacher can discuss how the appearance of oxygen (produced by cyanobacteria) ... Full description.

This Starting Point webpage describes a ConcepTest question that asks students to answer the multiple choice question; which of the following formulas represents an oxide? The website includes typical student responses before and after discussion, additional notes and references. Full description.

WebElements is an award-winning online periodic table. There is a Scholar Edition for students as well as a Professional Edition. Researchers click on the symbol for any element on the periodic table displayed on the home page. Information given for each element includes the name for the element in several languages, essentials (name, symbol, atomic weight, etc.), description, and isolation. Sidebars ... Full description.

An interactive version of the Periodic Table of the Elements. Each element is linked to a wealth of information concerning basic chemical properties, as well as short descriptions of its history, sources, compounds, uses, and isotopes. The table can be downloaded in PDF format. Other pages explain the purpose and use of the Periodic Table, and how new elements are named. A version of Mendeleev's original ... Full description.

In this lesson, students will view salt under varied magnifications and begin to construct the understanding that materials may be composed of parts that are too small to be seen without magnification. They will observe salt with the naked eye, and then under a hand lens, microscope, and the electron microscope (the electron image is via the Internet). In order to complete this lesson, it is important ... Full description.

This collection of resource features demonstrations, laboratory investigations, teaching tips, worksheets and other chemistry-related activities. Materials include investigations of mols, nuclear energy, the periodic table, weight and mass, elements, calculations, equations, pH, atomic weight, half-lives, and reactions. Full description.

Interactive applets illustrate the chemical structure of a variety of molecules. The molecules in this site are considered common based on their general uses world-wide, application in chemistry classrooms, or by the interest they spark because of their fascinating structural properties. Thumbnail images are organized by category, including biochemical, environmental, and medicinal molecules, minerals ... Full description.