词汇 | chemical-element |
释义 | chemical element noun[ C ] uk /ˌkem.ɪ.kəl ˈel.ɪ.mənt/ us /ˌkem.ɪ.kəl ˈel.ə.mənt/ a substance that cannot be broken down into any simpler chemical substances and is made of atoms all of the same type化学元素(不能再分的化学物质,由同类型的原子组成) Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium transition metal An atom is the smallest particle of a chemical element. The chemical elements composing the natural food of ordinary crops are ten in number, viz.—carbon, hydrogen, oxygen, nitrogen, sulphur, phosphorus, potassium, calcium, magnesium, and iron. The physical world is regarded as being composed of between sixty and seventy chemical elements, aggregated into an infinite variety of combinations. The reactions between two chemical elements under the same conditions are always the same. These nutritive compositions contain only such chemical elements in like chemical proportions as exist in the human body. Examples of chemical elementchemical element Since actual observed vesicle fillings are silicate minerals, chemicalelement transfers from basalt to geodes must have taken place. Before spectra of oxygen ions became known, these lines once led to a spurious identification of the substance as a new chemicalelement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The laboratory was honored in 2012 by having the synthetic chemicalelement livermorium named after it. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Server names may be named by their role or follow a common theme such as colors, countries, cities, planets, chemicalelement, scientists, etc. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In geochemistry, a trace element is a chemicalelement whose concentration is less than 1000 ppm or 0.1% of a rock's composition. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. S from the gas, but did not extract the sulfur as a chemicalelement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Most chemicalelement that enter into the dietary physiology of organisms are in the form of simple compounds. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The segmented tables permit easier examination of a particular chemicalelement with much less scrolling. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Each point plotted on the graph thus represents the nuclide of a real or hypothetical chemicalelement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A helium atom is an atom of the chemicalelement helium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Each type of atom corresponds to a specific chemicalelement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The second sentence, a use example, is a statement about the chemicalelement copper and not the word itself. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Indeed, the nuclear reactions in stars produce every naturally occurring chemicalelement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Put another way, a chemicalelement can not be transformed into other chemical elements by chemical processes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Sodium bromide can be used as a source of the chemicalelement bromine. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of chemical element These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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