0 a substance that cannot be broken down into any simpler chemical substances and is made of atoms all of the same type
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.
Since actual observed vesicle fillings are silicate minerals, chemical element 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 chemical element.
The laboratory was honored in 2012 by having the synthetic chemical element livermorium named after it.
中文繁体
化學元素(不能再分解成更簡單的化學物質,由同類型的原子組成)…
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化学元素(不能再分的化学物质,由同类型的原子组成)…
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elemento químico…
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pierwiastek (chemiczny)…
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