http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Video recordings for the hearing impaired.
1 videodisc (23 min.) : sound, color ; 4 3/4 in. + 1 teacher's guide.
A chronicle of the historical development of the concept of an "element" from the ideas of ancient Greece through modern quantum theory. Viewers learn that as scientists like Boyle, Dalton and Lavoisier began to recognize patterns in the behavior of chemicals they sought a unifying principle that would explain why different elements had different properties.
Special features: Discussion questions and activities -- A guide to the elements.