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1 чётко выраженный
•There are several distinct annealing stages.
•Elemental carbon exists in two well-defined crystalline allotropic forms.
•These compounds have clearly (or sharply) defined thermodynamic properties.
•These copolymers have a less pronounced (or marked) block structure.
•He has observed clear-cut changes of crystal habit.
•The excited state-producing step occurs in a separate, well-defined reaction.
•Well-marked differences have been discovered between...
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Carbon — (), but as most compounds with multiple single bonded oxygens on a single carbon it is unstable.] Cyanide (CN–), has a similar structure, but behaves much like a halide ion (pseudohalogen). For example it can form the nitride cyanogen molecule… … Wikipedia
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chemical industry — Introduction complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Although the chemical industry may be described simply as the industry that uses chemistry and… … Universalium
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chemical compound — Introduction any substance composed of identical molecules consisting of atoms (atom) of two or more chemical elements (chemical element). All the matter in the universe is composed of the atoms of more than 100 different chemical elements … Universalium