Examples from literature

• 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.