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This block began on 15:12, 27 August 2023 and has been set to finish on: <b>15:12, 27 August 2028</b>.</td></tr> </tbody></table> <div style="text-align: center;"><big> </big><p><big><b>You are not blocked from reading pages, only from changing or creating them.</b></big><br /> If you have just clicked a <span style="color:#BA0000; text-decoration:underline;">red link</span>, you were blocked from creating a new page as no article on that topic is there yet. </p> </div> If you think you were not blocked fairly, you may make unblock requests or file appeals at <a href="https://meta.wikimedia.org/wiki/Steward_requests/Global" class="extiw" title="meta:Steward requests/Global">meta:Steward requests/Global</a>.</div></div><hr /> <p>You can view and copy the source of this page. </p><textarea readonly="" accesskey="," id="wpTextbox1" cols="80" rows="25" style="" class="mw-editfont-monospace" lang="en" dir="ltr" name="wpTextbox1">{{For|the biology classification|species}} A '''chemical species''' is one of a group of [[atom]]s, [[molecule]]s, molecular [[wikt:fragment|fragment]]s, [[ion]]s, etc., made to go through to a [[chemical]] process or to a [[measurement]].<ref>{{Cite web |url=http://www.iupac.org/goldbook/C01038.pdf |title=IUPAC Gold Book definition of chemical species |access-date=2011-09-18 |archive-date=2007-09-27 |archive-url=https://web.archive.org/web/20070927085358/http://www.iupac.org/goldbook/C01038.pdf |url-status=dead }}</ref> Generally, a chemical species can be defined as an ensemble of chemically identical [[molecule|molecular]] entities that can [[wikt:explore|explore]] the same set of molecular [[energy level]]s on a defined time scale. Chemists also use chemical species to mean a set of chemically identical atomic or molecular structural units in a [[solid]] array. For example, when molecules of NaCl dissolve in water we don't really have any NaCl as such in the solution. We have Na<sup>+</sup> and Cl<sup>-</sup> ions because NaCl dissociates. We say the species present in solution are Na<sup>+</sup>(aq) and Cl<sup>-</sup>(aq). In this case, the species present in solution are the ions. In other cases, where the molecules don't dissolve in water, we would have molecular species in solution rather than ionic species.<ref>{{Cite web |url=http://dl.clackamas.cc.or.us/ch105-03/chemical1.htm |title=Chemical Species |access-date=2012-06-07 |archive-date=2012-12-30 |archive-url=https://web.archive.org/web/20121230065552/http://dl.clackamas.cc.or.us/ch105-03/chemical1.htm |url-status=dead }}</ref> In [[supramolecular chemistry]], chemical species are those supramolecular structures whose interactions and associations are brought about by forming or breaking intermolecular [[chemical bond|bond]]s. Studying these actions is the main topic of supramolecular chemistry. == References == <references/> [[Category:Chemistry]] {{chem-stub}} </textarea><div class="templatesUsed"><div class="mw-templatesUsedExplanation"><p>Templates used on this page: </p></div><ul> <li><a href="/wiki/Template:Chem-stub" title="Template:Chem-stub">Template:Chem-stub</a> (<a href="/w/index.php?title=Template:Chem-stub&action=edit" title="Template:Chem-stub">view source</a>) (semi-protected)</li><li><a href="/wiki/Template:Cite_web" title="Template:Cite web">Template:Cite web</a> (<a href="/w/index.php?title=Template:Cite_web&action=edit" title="Template:Cite web">view source</a>) (protected)</li><li><a href="/wiki/Template:For" title="Template:For">Template:For</a> (<a href="/w/index.php?title=Template:For&action=edit" title="Template:For">view source</a>) (semi-protected)</li><li><a href="/wiki/Template:Stub-template" title="Template:Stub-template">Template:Stub-template</a> (<a href="/w/index.php?title=Template:Stub-template&action=edit" title="Template:Stub-template">view source</a>) (protected)</li><li><a href="/wiki/Module:Arguments" title="Module:Arguments">Module:Arguments</a> (<a href="/w/index.php?title=Module:Arguments&action=edit" title="Module:Arguments">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1" title="Module:Citation/CS1">Module:Citation/CS1</a> (<a href="/w/index.php?title=Module:Citation/CS1&action=edit" title="Module:Citation/CS1">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/COinS" title="Module:Citation/CS1/COinS">Module:Citation/CS1/COinS</a> (<a href="/w/index.php?title=Module:Citation/CS1/COinS&action=edit" title="Module:Citation/CS1/COinS">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Configuration" title="Module:Citation/CS1/Configuration">Module:Citation/CS1/Configuration</a> (<a href="/w/index.php?title=Module:Citation/CS1/Configuration&action=edit" title="Module:Citation/CS1/Configuration">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Date_validation" title="Module:Citation/CS1/Date validation">Module:Citation/CS1/Date validation</a> (<a href="/w/index.php?title=Module:Citation/CS1/Date_validation&action=edit" title="Module:Citation/CS1/Date validation">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Identifiers" title="Module:Citation/CS1/Identifiers">Module:Citation/CS1/Identifiers</a> (<a href="/w/index.php?title=Module:Citation/CS1/Identifiers&action=edit" title="Module:Citation/CS1/Identifiers">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Utilities" title="Module:Citation/CS1/Utilities">Module:Citation/CS1/Utilities</a> (<a href="/w/index.php?title=Module:Citation/CS1/Utilities&action=edit" title="Module:Citation/CS1/Utilities">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Whitelist" title="Module:Citation/CS1/Whitelist">Module:Citation/CS1/Whitelist</a> (<a href="/w/index.php?title=Module:Citation/CS1/Whitelist&action=edit" title="Module:Citation/CS1/Whitelist">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/styles.css" title="Module:Citation/CS1/styles.css">Module:Citation/CS1/styles.css</a> (<a href="/w/index.php?title=Module:Citation/CS1/styles.css&action=edit" title="Module:Citation/CS1/styles.css">view source</a>) (protected)</li><li><a href="/wiki/Module:For" title="Module:For">Module:For</a> (<a href="/w/index.php?title=Module:For&action=edit" title="Module:For">view source</a>) (semi-protected)</li><li><a href="/wiki/Module:Format_link" title="Module:Format link">Module:Format link</a> (<a href="/w/index.php?title=Module:Format_link&action=edit" title="Module:Format link">view source</a>) (semi-protected)</li><li><a href="/wiki/Module:Hatnote" title="Module:Hatnote">Module:Hatnote</a> (<a href="/w/index.php?title=Module:Hatnote&action=edit" title="Module:Hatnote">view source</a>) (semi-protected)</li><li><a href="/wiki/Module:Hatnote/styles.css" title="Module:Hatnote/styles.css">Module:Hatnote/styles.css</a> (<a href="/w/index.php?title=Module:Hatnote/styles.css&action=edit" title="Module:Hatnote/styles.css">view source</a>) (semi-protected)</li><li><a href="/wiki/Module:Hatnote_list" title="Module:Hatnote list">Module:Hatnote list</a> (<a href="/w/index.php?title=Module:Hatnote_list&action=edit" title="Module:Hatnote list">view source</a>) (semi-protected)</li><li><a href="/wiki/Module:Yesno" title="Module:Yesno">Module:Yesno</a> (<a href="/w/index.php?title=Module:Yesno&action=edit" title="Module:Yesno">view source</a>) (protected)</li></ul></div><p id="mw-returnto">Return to <a href="/wiki/Chemical_species" title="Chemical species">Chemical species</a></p> <noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; 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