Editing Template:Infobox californium

{{infobox element
|number=98
|symbol=Cf
|name=californium
|abundance=
|abundance in earth's crust=
|abundance in oceans=
|abundance in solar system=
|left=[[berkelium]]
|right=[[einsteinium]]
|above=[[dysprosium|Dy]]
|below=(Upb)
|category=actinide
|period=7
|block=f
|appearance=silvery
|image name=Californium.jpg
|mass number=251{{sfn|CRC|2006|p=4.56}}
|electron configuration=&#91;[[radon|Rn]]&#93; 5f<sup>10</sup> 7s<sup>2</sup>
|electron configuration ref={{sfn|CRC|2006|p=1.14}}
|electrons per shell=2, 8, 18, 32, 28, 8, 2
|phase=solid
|Mohs hardness=3–4
|Mohs hardness ref={{sfn|CRC|1991|p=254}}
|density gpcm3nrt=15.1
|density gpcm3nrt ref={{sfn|CRC|2006|p=4.56}}<!-- {{sfn|O'Neil|2006|p=276}} - why cmt out? 07-2014-->
|melting point K=1173<!-- {{sfn|Greenwood|Earnshaw|1997|p=1263}} -->
|melting point C=900
|melting point ref={{sfn|CRC|2006|p=4.56}}
|melting point F=1652
|boiling point K=1743
|boiling point comment=''(estimation)''<ref>{{cite book|author1=Joseph Jacob Katz|author2=Glenn Theodore Seaborg|author3=Lester R. Morss|title=The Chemistry of the actinide elements|url=https://books.google.com/books?id=UuPvAAAAMAAJ|accessdate=11 July 2011|year=1986|publisher=Chapman and Hall|isbn=9780412273704|page=1038}}</ref>
|boiling point C=1470
|boiling point F=2678
|crystal structure=double hexagonal close packed
|crystal structure ref=
|crystal structure comment=
|oxidation states=2, '''3''', 4, 5
|oxidation states ref={{sfn|Greenwood|Earnshaw|1997|p=1265}}<ref>{{cite journal |last1=Kovács |first1=Attila |last2=Dau |first2=Phuong D. |last3=Marçalo |first3=Joaquim |last4=Gibson |first4=John K. |date=2018 |title=Pentavalent Curium, Berkelium, and Californium in Nitrate Complexes: Extending Actinide Chemistry and Oxidation States |journal=Inorg. Chem. |volume=57 |issue=15 |pages=9453–9467 |publisher=American Chemical Society |doi=10.1021/acs.inorgchem.8b01450 }}</ref>
|electronegativity=1.3
|electronegativity ref={{sfn|Emsley|1998|p=50}}
|number of ionization energies=1
|ionization energy 1=608
|ionization energy 1 ref={{sfn|CRC|2006|p=10.204}}
|CAS number=7440-71-3
|CAS number ref={{sfn|CRC|2006|p=4.56}}
|magnetic susceptibility=
|magnetic susceptibility ref=
|isotopes=
{{infobox element/isotopes decay2 | mn=248 | sym=Cf
|na=[[synthetic radioisotope|syn]] | hl=333.5&nbsp;d
|dm1=[[alpha emission|α]] (100%) | de1=6.369 | link1=curium-244 | pn1=244 | ps1=Cm
|dm2=[[spontaneous fission|SF]]&nbsp;(2.9×10<sup>−3</sup>%) | de2=0.0029 | pn2= | ps2=–}}
{{infobox element/isotopes decay2 | mn=249 | sym=Cf
|na=syn | hl=351&nbsp;y
|dm1=α (100%)| de1=6.295 | link1=curium-245 | pn1=245 | ps1=Cm
|dm2=SF&nbsp;(5.0×10<sup>−7</sup>%)| de2=4.4×10<sup>−7</sup> | pn2= | ps2=–}}
{{infobox element/isotopes decay2 | mn=250 | sym=Cf
|na=syn | hl=13.08&nbsp;y
|dm1=α (99.92%)| de1=6.129 | link1=curium-246 | pn1=246 | ps1=Cm
|dm2=SF (0.08%)| de2=0.077 | pn2= | ps2=–}}
{{infobox element/isotopes decay | mn=251 | sym=Cf
|na=syn | hl=898&nbsp;y
|dm=α | de=6.172 | link1=curium-247 | pn=247 | ps=Cm}}
{{infobox element/isotopes decay2 | mn=252 | sym=Cf
|na=syn | hl=2.645&nbsp;y
|dm1=α (96.91%)| de1=6.217 | link1=curium-248 | pn1=248 | ps1=Cm
|dm2=SF (3.09%)| de2=– | pn2= | ps2=–}}
{{infobox element/isotopes decay2 | mn=253 | sym=Cf
|na=syn | hl=17.81&nbsp;d
|dm1=[[beta emission|β<sup>−</sup>]] (99.69%) | de1=0.29 | link1=einsteinium-253 | pn1=253 | ps1=Es
|dm2=α (0.31%)| de2=6.126 | link2=curium-249 | pn2=249 | ps2=Cm}}
{{infobox element/isotopes decay2 | mn=254 | sym=Cf
|na=syn | hl=60.5&nbsp;d
|dm1=SF (99.69%) | de1=– | pn1= | ps1=–
|dm2=α (0.31%) | de2=5.930 | link2=curium-250 | pn2=250 | ps2=Cm}}

|isotopes ref={{sfn|CRC|2006|p=11.196}}<ref name="NNDC2008">{{cite web
|url = http://www.nndc.bnl.gov/chart/
|author = NNDC contributors
|editor = Sonzogni, Alejandro A. (Database Manager)
|title = Chart of Nuclides
|publisher = National Nuclear Data Center, Brookhaven National Laboratory
|accessdate = 1 March 2010
|date = 2008}}</ref>

|naming=after [[California]], where it was discovered
|discovered by=[[Lawrence Berkeley National Laboratory]]
|discovery date=1950
|QID=Q1888
}}<!--

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