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crystal
(Encyclopedia) CE5 Types of crystal crystal, a solid body bounded by natural plane faces that are the external expression of a regular internal arrangement of constituent atoms, molecules, or…duralumin
(Encyclopedia) duraluminduralumind&oobreve;rălˈyəmĭn, dy&oobreve;– [key], alloy of aluminum (over 90%) with copper (about 4%), magnesium (0.5%–1%), and manganese (less than l%). Before a…Firestone, Harvey Samuel
(Encyclopedia) Firestone, Harvey Samuel, 1868–1938, American industrialist, manufacturer of rubber products, b. Columbiana co., Ohio. The son of a prosperous farmer, Harvey Firestone began to…Terminus
(Encyclopedia) TerminusTerminustûrˈmĭnəs [key], in ancient Rome, both the boundary markers between properties and the name of the god who watched over boundaries. Property lines were of great…thallium
(Encyclopedia) thalliumthalliumthălˈēəm [key], metallic chemical element; symbol Tl; at. no. 81; interval in which at. wt. ranges 204.382–204.385; m.p. 303.5℃; b.p. about 1,457℃; sp. gr. 11.85 at 20…stereochemistry
(Encyclopedia) stereochemistry, study of the three-dimensional configuration of the atoms that make up a molecule and the ways in which this arrangement affects the physical and chemical properties…element
(Encyclopedia) CE5 element, in chemistry, a substance that cannot be decomposed into simpler substances by chemical means. A substance such as a compound can be decomposed into its constituent…annealing
(Encyclopedia) annealingannealingənēlˈĭng [key], process in which glass, metals, and other materials are treated to render them less brittle and more workable. Annealing consists of heating the…Kopp, Hermann Franz Moritz
(Encyclopedia) Kopp, Hermann Franz MoritzKopp, Hermann Franz Moritzhĕrˈmän fräntz mōˈrĭts kôp [key], 1817–92, German physical chemist and historian of chemistry. His research concerned the connection…cyclic compound
(Encyclopedia) cyclic compound, any one of a class of compounds whose molecules contain a number of atoms bonded together to form a closed chain or ring. If all of the atoms that form the ring are…Trending
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