en Free element

In chemistry, a free element is a chemical element that is not combined with or chemically bonded to other elements. Examples of elements which can occur as free elements include the oxygen molecule (O₂) and carbon.^[1] Other examples of free elements include the noble metals gold and platinum.^[2]

References

^ A. Earnshaw and Norman Greenwood. Chemistry of the Elements (Second Edition) ISBN 978-0-7506-3365-9. Mentions "free element" 30 times, for example, "Oxygen is the most abundant element on the earth's surface. It occurs both as a free element and in combination with innumerable compounds." and "Carbon occurs both as a free element and in combined form."
^ IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "Oxidation state". doi:10.1351/goldbook.O04365

This chemistry-related article is a stub. You can help Wikipedia by expanding it.