The varieties of matter may change greatly, and one variety or one chemical element may be transformed into another.
But no chemical element not found on the earth has ever been discovered in a meteor.
Hydrogen, a gaseous, chemical element, one of the constituents of water.
When one chemical element selects another and combines with it we call this chemical affinity.
Nitrogen: a chemical element, one of the most important and most expensive plant foods.
The chemical element is as much a manysided system as the organic cell or the whole vegetable kingdom.
It contains a large amount of a chemical element called carbon, the presence of which is characteristic of all organic material.
Selenium, the chemical element used in the operation, transmits the sound to the telephone, and your spoken word is reproduced.
We take it as 18, because it contains eighteen ultimate atoms, the smallest number we have found in a chemical element.
This principle of the “conservation of weight” led at once to a simple and unmistakable definition of a chemical element.