WebElements offers a very thorough listing of information arsenic, its uses and properties as well as basic data. very helpful.

Provides information on the development of the periodic table under the following sections: In the Beginning, Law of Triads, First Attempts At Designing a Periodic Table, Law of Octaves, Who Is the Father of the Periodic Table?,...

A great source of information on helium. Exceptionally thorough and well written.

An interactive periodic table of elements allows users to click on elements and discover the details of each one.

Using this interactive Periodic Table of Elements, learners can view real-time data, dynamically change layouts, visualize trends, and see a 3-D view of orbitals. The names of elements are available in dozens of different languages....

Different properties of the elements of the periodic table will be plotted and from this, a system of organization for the elements will be developed.

Students can use this resource to interact with the periodic table. Information is available for each element. This is a good source of information for younger students.

Click an element on the Periodic Table of Elements to learn more information such as the history and uses, origin of the name, isotope data, and more essential facts!

Do you know your elements and symbols? Test your knowledge of Earth's elements with this interactive Periodic Table of Elements game.

This site from Web Elements and Mark Winter provides complete information about the element Gadolinium. Includes physical data, uses, and and isolation techniques.

Explain how elements on the periodic table are arranged, and explain the relationships within each row and column. This lesson is 4 of 4 in the series titled "Periodic Table."

[Free Registration/Login may be required to access all resource tools.] Periods, groups and the classes of elements in the modern periodic table.

[Free Registration/Login may be required to access all resource tools.] Periods, groups and the classes of elements in the modern periodic table.

Discusses the history and organization of the periodic table, where the metalloids fit in, and their properties. Includes color-coded periodic table of elements.

[Free Registration/Login may be required to access all resource tools.] Describes the history of the periodic table, the Dobereiner triads, and the Newland octaves.

[Free Registration/Login may be required to access all resource tools.] Explains the organization of modern periodic table.

[Free Registration/Login may be required to access all resource tools.] Covers blocks, periods, and the periodic table.

[Free Registration/Login may be required to access all resource tools.] Mendeleev's periodic table and the groups and periods.

The Bohr model and atomic orbitals. Using an element's position in the periodic table to predict its properties, electron configuration, and reactivity.

This online resource is for information on the 16th element of the Periodic Table--Sulfur--can be found here. The site lists scientific information such as atomic weight, atomic number, melting/boiling point, and more. There is also a...

What is the periodic table? Learn how the elements are classified according to their properties and are organized into groups and periods.

An interactive periodic table. When you hover over an element, its name, atomic number, group, period, and electron affinity value appear.

A very nice site with all sorts of information on helium, including good summaries on isolation and uses of helium.

Very nice site with a great deal of excellent and helpful information on oxygen.