Periodic Videos
"Tables charting the chemical elements have been around since the 19th century - but this modern version has a short video about each one.
We've done all 118 - but our job's not finished. Now we're updating all the videos with new stories, better samples and bigger experiments.
All these videos are created by video journalist Brady Haran, featuring real working chemists from the University of Nottingham."
From the source
"WebElements™ was first released in September 1993 but -warning- the first versions (1.0-1.1 and various sub-versions) contain many errors in the data. I have tried to get all pirated copies of WebElements™ version 1 off the WWW but there are still a few out there. WebElementsTM is the WWW version of a computer program for Macintoshes called MacElements™ that I started work upon in 1989.The WebElements™ version that you are looking at now is under continual development, as is any decent web site. The layout is very different from early versions. Currently we do not offer a “frames” version. The directory structure is radically different so as to allow future expansion."
From the source
"The Royal Society of Chemistry's interactive periodic table features history, alchemy, podcasts, videos, and data trends across the periodic table. Click the tabs at the top to explore each section. Use the buttons above to change your view of the periodic table and view Murray Robertson’s stunning Visual Elements artwork. Click each element to read detailed information."
From the source
"Chemicool was the brainchild of David D. Hsu. of the Massachusetts Institute of Technology, Cambridge, MA. The website went online in 1996 and since then we have been trying to help out anyone involved in chemistry.
The data for this site were acquired with help from the following people; a big thanks goes out to all of them: Cabrol D.; Moore J. W and Kotz J. C. Additionally, the Perkin-Elmer Periodic Table v2.02g was used for Atomic mass, density, volume, group, heat of fusion, heat of vaporization, specific heat, and shells.
More recently, we have been updating pages with images, YouTube chemistry clips and a lot more information.
Since the site's launch we have won some awards. "Ten Cool Sites" for Exploratorium Learning Studio's best in Science, Art, & K-12 sites would be our best achievement so far."
From the source
NIST-JANAF Thermochemical Tables
The online version of the print version
Periodic Table of Chemical Elements
The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius.
Printable Periodic Table of Elements
"A good periodic table is a necessary part of every chemist's, or future chemist's, reference materials. After looking around for a useful printable periodic table, I found that most were pretty basic and included only a few properties. So, we set out to create a periodic table using Excel that would include as many of the important chemical and physical properties as we could reasonably fit on a single piece of 8 1/2 x 11" paper."
From the source