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Californium is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. Even so, if you can update or improve it, please do so.

This article appeared on Wikipedia's Main Page as Today's featured article on July 21, 2011.

Article milestones
Date	Process	Result
January 7, 2011	Peer review	Reviewed
March 11, 2011	Featured article candidate	Not promoted
April 9, 2011	Good article nominee	Listed
July 4, 2011	Featured article candidate	Promoted
September 29, 2014	Good topic candidate	Promoted
February 15, 2024	Good topic removal candidate	Demoted
Facts from this article were featured on Wikipedia's Main Page in the "On this day..." column on March 17, 2006, March 17, 2007, March 17, 2010, March 17, 2012, March 17, 2016, and March 17, 2020.
Current status: Featured article

Elements Mid‑importance

	Chemistry portal This article is supported by WikiProject Elements, which gives a central approach to the chemical elements and their isotopes on Wikipedia. Please participate by editing this article, or visit the project page for more details.ElementsWikipedia:WikiProject ElementsTemplate:WikiProject Elementschemical elements
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California: San Francisco Bay Area Mid‑importance

	California portal This article is within the scope of WikiProject California, a collaborative effort to improve the coverage of the U.S. state of California on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CaliforniaWikipedia:WikiProject CaliforniaTemplate:WikiProject CaliforniaCalifornia
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	United States portal This article is within the scope of WikiProject United States, a collaborative effort to improve the coverage of topics relating to the United States of America on Wikipedia. If you would like to participate, please visit the project page, where you can join the ongoing discussions. Template Usage Articles Requested! Become a Member Project Talk Alerts United StatesWikipedia:WikiProject United StatesTemplate:WikiProject United StatesUnited States
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	This article is within the scope of WikiProject University of California, a collaborative effort to improve the coverage of articles relating to University of California, its history, accomplishments and other topics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.University of CaliforniaWikipedia:WikiProject University of CaliforniaTemplate:WikiProject University of CaliforniaUniversity of California
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Metal detectors?

If I buy a metal detector, will I be able to obtain the Cf out of it? Porygon-Z 04:14, 3 December 2018 (UTC) — Preceding unsigned comment added by Porygon-Z474 (talk • contribs)

No. Keres🌕Luna ^edits! 19:29, 29 April 2022 (UTC)[reply]

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-==Untitled==
-Article changed over to new [[Wikipedia:WikiProject Elements]] format by [[User:Maveric149|mav]] 08:17, 31 Mar 2004 (UTC). Elementbox converted 11:47, 17 July 2005 by [[User:Femto|Femto]] (previous revision was that of [http://en.wikipedia.org/enwiki/w/index.php?title=Californium&oldid=18561824 23:40, 10 July 2005]).  10 July 2005
-== External links modified ==
-Hello fellow Wikipedians,
-I have just modified one external link on [[Californium]]. Please take a moment to review [https://en.wikipedia.org/enwiki/w/index.php?diff=prev&oldid=781247860 my edit]. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit [[User:Cyberpower678/FaQs#InternetArchiveBot|this simple FaQ]] for additional information. I made the following changes:
-*Added archive https://web.archive.org/web/20110721032736/http://www.evs.anl.gov/pub/doc/Californium.pdf to http://www.evs.anl.gov/pub/doc/Californium.pdf
-When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
-{{sourcecheck|checked=false|needhelp=}}
-Cheers.—[[User:InternetArchiveBot|'''<span style="color:darkgrey;font-family:monospace">InternetArchiveBot</span>''']] <span style="color:green;font-family:Rockwell">([[User talk:InternetArchiveBot|Report bug]])</span> 01:18, 20 May 2017 (UTC)
-== External links modified ==
-Hello fellow Wikipedians,
-I have just modified one external link on [[Californium]]. Please take a moment to review [https://en.wikipedia.org/enwiki/w/index.php?diff=prev&oldid=788835861 my edit]. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit [[User:Cyberpower678/FaQs#InternetArchiveBot|this simple FaQ]] for additional information. I made the following changes:
-*Added archive https://web.archive.org/web/20100601160926/http://www.ornl.gov/~webworks/cpr/pres/107270_.pdf to http://www.ornl.gov/~webworks/cpr/pres/107270_.pdf
-When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
-{{sourcecheck|checked=false|needhelp=}}
-Cheers.—[[User:InternetArchiveBot|'''<span style="color:darkgrey;font-family:monospace">InternetArchiveBot</span>''']] <span style="color:green;font-family:Rockwell">([[User talk:InternetArchiveBot|Report bug]])</span> 19:30, 3 July 2017 (UTC)
-== Smoke detectors? ==
-I though that Cf is (or was) used ionization-type [[smoke detectors]], but a casual look found nothing in our article. Did I miss it?
-Nope, it's [[Americium-241]]. Left in for the next forgetful old duffer..... --[[User:Tillman|Pete Tillman]] ([[User talk:Tillman|talk]]) 23:53, 12 November 2017 (UTC)
 == Metal detectors? ==
 If I buy a metal detector, will I be able to obtain the Cf out of it? Porygon-Z 04:14, 3 December 2018 (UTC)  <!-- Template:Unsigned --><small class="autosigned">—&nbsp;Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Porygon-Z474|Porygon-Z474]] ([[User talk:Porygon-Z474#top|talk]] • [[Special:Contributions/Porygon-Z474|contribs]]) </small> <!--Autosigned by SineBot-->
+:No. [[User:Keresluna|Keres🌕]][[User_talk:Keresluna|Luna]] <sup>[[Special:Contributions/Keresluna|edits!]]</sup> 19:29, 29 April 2022 (UTC)