text: # Rubidium
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Rubidium sê siŏh cṳ̄ng gĭng-sṳ̆k, iâ sê siŏh cṳ̄ng huá-hŏk nguòng-só.  Nguòng-cṳ̄ sê̤ṳ-só sê 37, huá-hŏk hù-hô̤ sê Rb.
  
title: Rubidium
wikitext: {{twinLAT|銣}}
  {{Infobox element
  |name=Rubidi
  |enname=rubidium
  |laname=rubidium
  |number=37
  |symbol=Rb
  |left=[[krypton]]
  |right=[[strontium|Stronti]]
  |above=[[Gák (gĭng-sṳ̆k)|Kali]]
  |below=[[caesium|Caesi]]
  |series=giĕng-gĭng-sṳ̆k
  |series comment=
  |group=1
  |period=5
  |block=s
  |series color=
  |appearance=grey white
  |image name=Rb5.JPG
  |image size=
  |image name comment=
  |image name 2=
  |image size 2=
  |image name 2 comment=
  |atomic mass=85.4678
  |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=3
  |atomic mass comment=
  |electron configuration=&#91;[[krypton|Kr]]&#93; 5s<sup>1</sup>
  |electrons per shell=2, 8, 18, 8, 1
  |color=
  |phase=gó-tā̤
  |phase comment=
  |density gplstp=
  |density gpcm3nrt=1.532
  |density gpcm3nrt 2=
  |density gpcm3nrt 3=
  |density gpcm3mp=1.46
  |melting point K=312.45
  |melting point C=39.30
  |melting point F=102.74
  |sublimation point K=
  |sublimation point C=
  |sublimation point F=
  |boiling point K=961
  |boiling point C=688
  |boiling point F=1270
  |triple point K=312.41
  |triple point kPa=?
  |triple point ref=<ref name=b92/>
  |critical point K=2093
  |critical point MPa=16
  |critical point comment=''(extrapolated)''<ref name=b92>{{RubberBible92nd|page=4.122}}</ref>
  |heat fusion=2.19
  |heat fusion 2=
  |heat vaporization=69
  |heat capacity=31.060
  |vapor pressure 1=434
  |vapor pressure 10=486
  |vapor pressure 100=552
  |vapor pressure 1 k=641
  |vapor pressure 10 k=769
  |vapor pressure 100 k=958
  |vapor pressure comment=
  |crystal structure=body-centered cubic
  |oxidation states='''+1''', −1
  |oxidation states comment=(a strongly [[base (chemistry)|basic]] oxide)
  |electronegativity=0.82
  |number of ionization energies=3
  |ionization energy 1=403
  |ionization energy 2=2632.1
  |ionization energy 3=3859.4
  |atomic radius=248
  |atomic radius calculated=
  |covalent radius=220±9
  |Van der Waals radius=303
  |magnetic ordering=[[paramagnetic]]
  |magnetic ordering ref=<ref name=magnet>[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=
  |electrical resistivity unit prefix=n
  |electrical resistivity at 0=
  |electrical resistivity at 20=128
  |thermal conductivity=58.2
  |thermal conductivity 2=
  |thermal diffusivity=
  |thermal expansion=90
  |thermal expansion ref=<ref>http://www.owlnet.rice.edu/~msci301/ThermalExpansion.pdf</ref>
  |thermal expansion comment=(at&nbsp;{{abbr|r.t.|room temperature}})
  |thermal expansion at 25=
  |speed of sound=
  |speed of sound rod at 20=1300
  |speed of sound rod at r.t.=
  |tensile strength=
  |Young's modulus=2.4
  |Shear modulus=
  |Bulk modulus=2.5
  |Poisson ratio=
  |Mohs hardness=0.3
  |Vickers hardness=
  |Brinell hardness=0.216
  |CAS number=7440-17-7
  |isotopes={{infobox element/isotopes_decay2 | mn=83 | sym=Rb
   | na=[[synthetic radioisotope|syn]] | hl=86.2&nbsp;d
   | dm1=[[electron capture|ε]] | de1=– | link1=krypton-83 | pn1=83 | ps1=Kr
   | dm2=[[gamma radiation|γ]] | de2=0.52, 0.53,<br/>0.55 | pn2= | ps2=– }}
  {{infobox element/isotopes_decay4 | mn=84 | sym=Rb
   | na=syn | hl=32.9&nbsp;d
   | dm1=ε | de1=– | link1=krypton-84 | pn1=84 | ps1=Kr
   | dm2=[[positron emission|β<sup>+</sup>]] | de2=1.66, 0.78 | pn2=84 | ps2=Kr
   | dm3=γ | de3=0.881 | pn3= | ps3=–
   | dm4=[[beta decay|β<sup>−</sup>]] | de4=0.892 | link4=strontium-84 | pn4=84 | ps4=Sr}}
  {{infobox element/isotopes_stable | mn=85 | sym=Rb | na=72.17% | n=48 }}
  {{infobox element/isotopes_decay2 | mn=86 | sym=Rb
   | na=syn | hl=18.65&nbsp;d
   | dm1=β<sup>−</sup> | de1=1.775 | link1=strontium-86 | pn1=86 | ps1=Sr
   | dm2=γ | de2=1.0767 | pn2= | ps2=– }}
  {{infobox element/isotopes_decay | mn=87 | sym=Rb
   | na=27.83% | hl=4.9{{e|10}}&nbsp;y
   | dm=β<sup>−</sup> | de=0.283 | link1=strontium-87 | pn=87 | ps=Sr}}
  |isotopes comment=
  |discovered by=[[Robert Bunsen]] and [[Gustav Kirchhoff]]
  |discovery date=1861
  |first isolation by=[[George de Hevesy]]
  }}
  '''Rubidium''' sê siŏh cṳ̄ng [[gĭng-sṳ̆k]], iâ sê siŏh cṳ̄ng [[huá-hŏk nguòng-só]].  [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 37, huá-hŏk hù-hô̤ sê Rb.
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