An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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chemical element
  بن‌پار ِ شیمیایی، عنصر ِ ~  
bonpâr-e šimiyâyi (#), onsor-e ~ (#)
Fr.: élément chimique  

A substance which consists entirely of atoms of the same → atomic number and cannot be decomposed or changed into another substance using chemical means. Currently 118 chemical elements are known, the most abundant being → hydrogen. → periodic table.

See also: → chemical; → element.