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{{About|សារធាតុគីមី|the use of lithium as a medication|Lithium (medication)|other uses|Lithium (disambiguation)}}
{{Infobox lithium}}

'''លីស្យូម''' ({{lang-en|Lithium}} ពីភាសាក្រិច''lithos'' មានន័យថា 'ថ្ម') គឺជាសារធាតុគីមីម្យ៉ាង
is a soft, silver-white [[metal]] with [[Chemical symbol|symbol]] '''Li''' and [[atomic number]] 3. It belongs to the [[alkali metal]] group of [[chemical elements]]. Under [[standard conditions for temperature and pressure|standard conditions]] it is the lightest metal and the least dense solid element. Like all alkali metals, lithium is highly reactive and flammable. For this reason, it is typically stored in [[mineral oil]]. When cut open, lithium exhibits a metallic [[luster (mineralogy)|luster]], but contact with moist air [[corrosion|corrodes]] the surface quickly to a dull silvery gray, then black tarnish. Because of its high [[reactivity (chemistry)|reactivity]], lithium never occurs freely in nature, and instead, only appears in [[chemical compound|compounds]], which are usually [[ionic compound|ionic]]. Lithium occurs in a number of [[pegmatite|pegmatitic]] minerals, but due to its solubility as an ion is present in ocean water and is commonly obtained from [[brine]]s and [[clay]]s. On a commercial scale, lithium is isolated [[electrolysis|electrolytically]] from a mixture of [[lithium chloride]] and [[potassium chloride]].


==See also==
* [[Dilithium]]
* [[Lithium (medication)]]
* [[:Category:Lithium compounds|Lithium compounds]]
* [[Lithium-based grease]]
* [[Lithium–air battery|Lithium-air battery]]
* [[Lithium-ion battery]]
{{Subject bar
|book1=Lithium
|book2=Period 2 elements
|book3=Alkali metals
|book4=Chemical elements (sorted alphabetically)
|book5=Chemical elements (sorted by number)
|portal=Chemistry
|commons=y
|wikt=y
|v=y
|v-search=Lithium atom
|b=y
|b-search=Wikijunior:The Elements/Lithium
}}

==Notes==
<references group=note/>

==References==
{{Reflist|colwidth=30em}}

==External links==
* [http://www.periodicvideos.com/videos/003.htm Lithium] at ''[[The Periodic Table of Videos]]'' (University of Nottingham)
* [http://www.lithiumalliance.org/ International Lithium Alliance]
* [http://minerals.usgs.gov/minerals/pubs/commodity/lithium/ USGS: Lithium Statistics and Information]
* [http://trugroup.com/whitepapers/TRU-Lithium-Outlook-2020.pdf Lithium Supply & Markets 2009 IM Conference 2009 Sustainable lithium supplies through 2020 in the face of sustainable market growth]
* [http://www.mcis.soton.ac.uk/Site_Files/pdf/nuclear_history/Working_Paper_No_5.pdf University of Southampton, Mountbatten Centre for International Studies, Nuclear History Working Paper No5.]
{{Compact periodic table}}
{{Lithium compounds}}
{{alkalimetals}}

{{Use dmy dates|date=May 2012}}

[[Category:Lithium| ]]
[[Category:Alkali metals]]
[[Category:Chemical elements]]
[[Category:Reducing agents]]delete|មិនមែនភាសាខ្មែរ}}