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man-made elements |
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man-made elements: see synthetic elements synthetic elements, in chemistry, radioactive elements that were not discovered occurring in nature but as artificially produced isotopes. They are technetium (at. no. 43), which was the first element to be synthesized, promethium (at. no. 61), astatine (at. no. ..... Click the link for more information. . |
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This is a light-maintenance bridge, whose man-made elements have been translated by architecture into something as beautiful as it is unexpected. The developers took the name "greenbelt" from the ideal of the same name used by the famous architec, Le Corbusier, who believed that artificial, man-made elements in the metropolis should be integrated with the environment. These man-made elements, also called "heavy elements," are often unstable--they exist briefly before decaying, or breaking apart into smaller elements. |
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man-made elements
