Science Struck
Science Struck: Metalloids in the 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.
Science Struck
Science Struck: What Are the Uses of Chalcogens?
The uses of each of the five chalcogens, i.e., the oxygen family of elements, are described.
Mocomi & Anibrain Digital Technologies
Mocomi: Marie Curie Biography
Interesting biographical information, research and discoveries, and famous quotes about Marie Curie, the most famous female scientist of all time.
Wikimedia
Wikipedia: Chalcogen
An informative article from the Wikipedia encyclopedia about Group 16 from the Periodic Table (also known as the Chalcogens). It gives information about their compounds and on the oxidation numbers of the elements.