Chemistry is a branch of science that involves the study of the composition, structure and properties of matter. It is a creative discipline chiefly concerned with atomic and molecular structure and its change, for instance through chemical reactions.
Interactive Periodic Table – Royal Society of Chemistry
Dmitri Ivanovich Mendeleev – Wiki for the Russian scientist who formulated the Periodic Law.
Periodic Videos – The classic University of Notthingam Youtube videos of chemistry.
CrashCourse Chemistry – Introductory video course to the history and basic elements of the science of chemistry.
Khan Academy Course on Highschool Chemistry – Currently in development.