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| mass = 140.12
 
| mass = 140.12
 
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'''Cerium''' (symbol '''Ce''') is a [[chemistry|chemical]] [[element]], a higly reactive [[metal]] with [[atom]]ic number 58 on the [[periodic table]]. Cerium has an atomic mass of 140.12, and was discovered by [[Human]]s for the first time on [[Earth]]'s [[Europe]]an continent in the [[year]] [[1803]]. ({{r|TOS|Star Fleet Medical Reference Manual}})
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'''Cerium''' (symbol '''Ce''') is a [[chemistry|chemical]] [[element]], a higly reactive [[metal]] with [[atom]]ic number 58 on the [[periodic table]]. Cerium has an atomic mass of 140.12, and was discovered by [[Human]]s for the first time on [[Earth]]'s [[Europe]]an continent in the [[year]] [[1803]]. ({{r|ST|Star Fleet Medical Reference Manual}})
   
 
One of the [[Federation]]'s largest sources of cerium in the [[23rd century]] was the [[mining]] [[colony]] on [[planet]] [[Janus VI]]. ({{e|TOS|The Devil in the Dark}})
 
One of the [[Federation]]'s largest sources of cerium in the [[23rd century]] was the [[mining]] [[colony]] on [[planet]] [[Janus VI]]. ({{e|TOS|The Devil in the Dark}})

Revision as of 16:14, April 3, 2010

Cerium (symbol Ce) is a chemical element, a higly reactive metal with atomic number 58 on the periodic table. Cerium has an atomic mass of 140.12, and was discovered by Humans for the first time on Earth's European continent in the year 1803. (ST reference: Star Fleet Medical Reference Manual)

One of the Federation's largest sources of cerium in the 23rd century was the mining colony on planet Janus VI. (TOS episode: "The Devil in the Dark")

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