text: # Barium
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Barium sê siŏh cṳ̄ng gĭng-sṳ̆k, iâ sê siŏh cṳ̄ng huá-hŏk nguòng-só.  Nguòng-cṳ̄ sê̤ṳ-só sê 56, huá-hŏk hù-hô̤ sê Ba.
title: Barium
wikitext: {{twinLAT|鋇}}
  {{Infobox element
  |name=bari
  |enname=barium
  |laname=barium
  |number=56
  |symbol=Ba
  |left=[[caesium|Caesi]]
  |right=[[lanthanum|Lantan]]
  |above=[[Strontium|Stronti]]
  |below=[[Lòi (gĭng-sṳ̆k)|Radi]]
  |series=giĕng-tū gĭng-sṳ̆k
  |series comment=
  |group=2
  |period=6
  |block=s
  |series color=
  |appearance=silvery gray; with a pale yellow tint<ref>{{Greenwood&Earnshaw|page=112}}</ref>
  |image name=Barium unter Argon Schutzgas Atmosphäre.jpg
  |image name comment=
  |image name 2=
  |image name 2 comment=
  |atomic mass=137.327
  |atomic mass ref=<ref name="IUPAC">[http://www.ciaaw.org/atomic-weights.htm Standard Atomic Weights 2013]. [[Commission on Isotopic Abundances and Atomic Weights]]</ref>
  |atomic mass 2=7
  |atomic mass comment=
  |electron configuration=&#91;[[xenon|Xe]]&#93; 6s<sup>2</sup>
  |electrons per shell=2, 8, 18, 18, 8, 2
  |color=
  |phase=gó-tā̤
  |phase comment=
  |density gplstp=
  |density gpcm3nrt=3.51
  |density gpcm3mp=3.338
  |melting point K=1000
  |melting point C=727
  |melting point F=1341
  |boiling point K=2118
  |boiling point C=1845
  |boiling point F=3353
  |triple point K=
  |triple point kPa=
  |critical point K=
  |critical point MPa=
  |heat fusion=7.12
  |heat vaporization=142
  |heat capacity=28.07
  |vapor pressure 1=911
  |vapor pressure 10=1038
  |vapor pressure 100=1185
  |vapor pressure 1 k=1388
  |vapor pressure 10 k=1686
  |vapor pressure 100 k=2170
  |vapor pressure comment=
  |crystal structure=body-centered cubic
  |oxidation states='''+2''', +1
  |oxidation states comment=(a strongly [[base (chemistry)|basic]] oxide)
  |electronegativity=0.89
  |number of ionization energies=3
  |ionization energy 1=502.9
  |ionization energy 2=965.2
  |ionization energy 3=3600
  |atomic radius=222
  |covalent radius=215±11
  |Van der Waals radius=268
  |magnetic ordering=[[paramagnetism|paramagnetic]]
  |magnetic ordering ref=<ref>[http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf Magnetic susceptibility of the elements and inorganic compounds], in {{RubberBible86th}}</ref>
  |electrical resistivity unit prefix=n
  |electrical resistivity at 0=
  |electrical resistivity at 20=332
  |thermal conductivity=18.4
  |thermal conductivity 2=
  |thermal diffusivity=
  |thermal expansion=
  |thermal expansion at 25=20.6
  |speed of sound=
  |speed of sound rod at 20=1620
  |speed of sound rod at r.t.=
  |Young's modulus=13
  |Shear modulus=4.9
  |Bulk modulus=9.6
  |Poisson ratio=
  |Mohs hardness=1.25
  |Vickers hardness=
  |Brinell hardness=
  |CAS number=7440-39-3
  |isotopes=
  {{infobox element/isotopes decay | mn=130 | sym=Ba | na=0.106% | hl=(0.5–2.7)×10<sup>21</sup>&nbsp;y | dm=[[double electron capture|εε]] | de=2.620 | link1=xenon-130 | pn=130 | ps=Xe}}
  {{infobox element/isotopes decay | mn=132 | sym=Ba | na=0.101% | hl=>3×10<sup>20</sup>&nbsp;y | dm=([[double beta decay|β<sup>+</sup>β<sup>+</sup>]]) | de=0.846 | link1=xenon-132 | pn=132 | ps=Xe}}
  {{infobox element/isotopes decay | mn=133 | sym=Ba
   | na=[[synthetic radioisotope|syn]] | hl=10.51&nbsp;y
   | dm=[[electron capture|ε]] | de=0.517 | link1=caesium-133 | pn=133 | ps=Cs}}
  {{infobox element/isotopes decay | mn=134 | sym=Ba | na=2.417% | hl=– | dm=([[spontaneous fission|SF]]) | de=<40.520 | pn= | ps= }}
  {{infobox element/isotopes decay | mn=135 | sym=Ba | na=6.592% | hl=– | dm=(SF) | de=<39.357 | pn= | ps= }}
  {{infobox element/isotopes decay | mn=136 | sym=Ba | na=7.854% | hl=– | dm=(SF) | de=<38.041 | pn= | ps= }}
  {{infobox element/isotopes decay | mn=137 | sym=Ba | na=11.23% | hl=– | dm=(SF) | de=<35.722 | pn= | ps= }}
  {{infobox element/isotopes decay | mn=138 | sym=Ba | na=71.7% | hl=– | dm=(SF) | de=<34.302 | pn= | ps= }}
  |isotopes comment=Decay modes in parentheses are predicted, but have not yet been observed
  |discovered by=[[Carl Wilhelm Scheele]]
  |discovery date=1772
  |first isolation by=[[Humphry Davy]]
  |first isolation date=1808
  }}
  '''Barium''' sê siŏh cṳ̄ng [[gĭng-sṳ̆k]], iâ sê siŏh cṳ̄ng [[huá-hŏk nguòng-só]].  [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 56, huá-hŏk hù-hô̤ sê Ba.
  ==Huá-hŏk séng-cék==
  
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  [[分類:Huá-hŏk nguòng-só]]