Our ClickView library has a large number of videos covering different aspects of chemistry, many of these are less than 10 minutes in duration. If you need help understanding a particular aspect of chemistry, browse this database for a relevant video.
Periodic Table (Royal Society of Chemistry)
A good periodic table that provides in-depth information and videos about each element.
K12 Periodic Table (App)
Available for iPad and Android devices, this free app provides a good periodic table.