(Encyclopedia) wool, fiber made from the fleece of the domestic sheep.
In the United States, by the Wool Products Labeling Act of 1939, the term wool may be applied only to fabrics made…
(Encyclopedia) uraniumuraniumy&oomacr;rāˈnēəm [key], radioactive metallic chemical element; symbol U; at. no. 92; mass number of most stable isotope 238; m.p. 1,132℃; b.p. 3,818℃; sp. gr. 19.1 at…
(Encyclopedia) acids and bases, two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water.
Another theory that…
(Encyclopedia)
CE5
A. Water molecule (black circles represent valence-shell electrons)
B. Structure of ice: Each oxygen atom (white circles) is bonded to four other oxygen atoms by hydrogen bonds…
(Encyclopedia)
CE5
Basic molecules in rubber
rubber, any solid substance that upon vulcanization becomes elastic; the term includes natural rubber (caoutchouc) and synthetic rubber. The term…
