Ptable is an interactive Web 2.0 periodic table. It provides dynamic layouts, property trend visualization, orbitals, thousands of isotopes, and 5 writeup sources. The application uses no Flash or images, giving all the scalability and accessibility of a normal web page (it can be viewed on any kind of computer and device).
The layout, unless differently specified by the user, automatically switch to fit the width of the screen. Using the check boxes at the top of the page allows to dynamically switch between various configurations (simple, with names, with electron configuration, and inline inner transition metals).
In addition to Wikipedia descriptions in all languages, write-ups, photos, videos, and even podcasts are offered in the first tab's dropdown. Write-up windows can even be torn off or docked to the edges to allow simultaneous use of the table while reading.
Data is acquired from primary sources and curated libraries. Layout and presentation were reviewed by the world's foremost periodic table academic, Eric Scerri. Translations and non-English element names, however, should be considered no more reliable than Wikipedia.
Search (into the box at the top right) can be performed by name, symbol, or atomic number. Advanced searches work, for example, on the atomic weight, number of orbitals, etc.
Most browsers, tablets, and phones can store the site and its data for use offline. Firefox prompts you with a notification bar at the top while Chrome and Safari directly save it.
Full descriptions in 40 languages from Wikipedia.