RT Generic DB /z-wcorg/ DS http://worldcat.org ID 32107727 LA Closed-captioned. T1 The world of chemistry. Program 19, Program 20, Program 19, Program 20, A1 Hoffmann, Roald., University of Maryland, College Park., Educational Film Center (Annandale, Va.), Annenberg/CPB Project., PB Annenberg/CPB PP S. Burlington, VT YR 1990 SN 155946223X : 9781559462235 1559462337 9781559462334 AB Pt. 19. Examines the important properties of metals including malleability, ductility, and conductivity. Explores the methods used to extract metals from ores and to blend metals to form alloys. -- Pt. 20. Teaches how the surface of a substance reacts and interacts at the molecular level and explores the world of surface science.