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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.
Server names may be named by their role or follow a common theme such as colors, countries, cities, planets, chemical element, scientists, etc.
In geochemistry, a trace element is a chemical element whose concentration is less than 1000 ppm or 0.1% of a rock's composition.
S from the gas, but did not extract the sulfur as a chemical element.
Most chemical element that enter into the dietary physiology of organisms are in the form of simple compounds.
The segmented tables permit easier examination of a particular chemical element with much less scrolling.
Each point plotted on the graph thus represents the nuclide of a real or hypothetical chemical element.
A helium atom is an atom of the chemical element helium.
Each type of atom corresponds to a specific chemical element.
The second sentence, a use example, is a statement about the chemical element copper and not the word itself.
Indeed, the nuclear reactions in stars produce every naturally occurring chemical element.
Put another way, a chemical element can not be transformed into other chemical elements by chemical processes.
Sodium bromide can be used as a source of the chemical element bromine.
