| 词条 | Free element |
| 释义 |
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 (O{{sub|2}}) and carbon.[1] All atoms of free elements have an oxidation number of 0.[2] See also
References1. ^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." {{chem-stub}}2. ^{{GoldBookRef|title=Oxidation state|file=O04365}} 1 : Chemistry |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。