Covalent Nomenclature 
     (the atomic naming system of combining number prefixes with compound names) - see the slideshow linked above
Covalent Nomenclature: # of Atoms (# prefix) + Compoundcovalent nomenclature: number prefix + compound +-ide suffix

PBS NOVA: Hunting the Elements (2 hr. video series)    - PBS Chemistry Resources (quiz, interactive periodic table, videos)

THE MYSTERY OF MATTER Documentary series:  1: Out of Thin Air   2: Unruly Elements  3: Into the Atom   - PBS Edu Resources (practice)

Chemistry: The Discovery of the Elements (BBC video, 50 mins.)

INTERACTIVE PERIODIC TABLES: with video, history, text, & images

Periodic Table of Technology by Beacon (learn about the elements used in daily life)

Periodic Table of Elements