Research Guides: Chemical and Physical Property Information: Periodic Tables

History of the Periodic Table

C&EN: It's Elemental: The Periodic Table
A series of articles about the periodic table and each element created in celebration of the 80th anniversary of Chemical and Engineering News.
Chemistry in Its Element
Chemistry World's whirlwind tour of the periodic table: a leading scientist or author tells the story behind each element via an online podcast. Sponsored by the Royal Society of Chemistry.

Chemistry of the Elements (2nd ed.)
CRC Periodic Table Online
CRC Press offers a more stream-lined version of the periodic table.
Periodic Table of Data
Created by the Royal Society of Chemistry (RSC).
Periodic Table of the Elements
Created by the American Chemical Society (ACS).
Periodic Table of the Elements
From Wikipedia.
Visual Elements Periodic Table
Sponsored by the Royal Society of Chemistry (RSC).
Web Elements
Up-to-date interactive table, providing lots of additional information, including background information, compounds, electronic properties, physical properties, crystallography (with visualization options), nuclear properties. Download printable versions.