What is a periodic table?
http://www.mocomi.com presents: What is a periodic table? There are 118 chemical elements known to man. This is a large number and with all these elements combining to make different compounds, understanding them can be very confusing. Here to the rescue we have the Periodic Table, a tabular arrangement of all the known chemical elements according to their structural properties. Learn about how the period table works, through this animated learning module.