Main Page | See live article | Alphabetical index A chemical symbol is an abbreviation or short representation of the name of a chemical element. Natural elements all have symbols of one or two letters; some man-made elements have symbols of three letters. Chemical symbols are listed in the periodic table and are used as shorthand and in chemical equations, e.g., 2 H2 + O2 → 2 H2O Because chemical symbols are often derived from the Latin or Greek name of the element, they may not bear much resemblance to the common English name, e.g., Na for sodium (Latin natrium) and Au for gold (Latin aurum). For complete listings of the chemical elements and their symbols, see: List of elements by symbol List of elements by name List of elements by number This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.