text: # Promethium
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Promethium sê siŏh cṳ̄ng gĭng-sṳ̆k, iâ sê siŏh cṳ̄ng huá-hŏk nguòng-só.  Nguòng-cṳ̄ sê̤ṳ-só sê 61, huá-hŏk hù-hô̤ sê Pm.
  
title: Promethium
wikitext: {{twinLAT|鉕}}
  {{Infobox element
  |image name=
  |image alt=
  |image size=
  |image name comment=
  |image name 2=File:Promethium spectrum visible.png
  |image alt 2=Promethium spectrum visible.png
  |image size 2=
  |image name 2 comment=Spectral lines of promethium 
  |number=61
  |symbol=Pm
  |name=Promethi
  |laname=promethium
  |left=[[neodymium|Neodymi]]
  |right=[[samarium|Samari]]
  |above=–
  |below=[[neptunium|Neptuni]]
  |series=lanthanum-hiê
  |period=6
  |group=n/a
  |block=f
  |appearance=metallic
  |atomic mass= [145]
  |electron configuration=&#91;[[xenon|Xe]]&#93; 4f<sup>5</sup> 6s<sup>2</sup>
  |electrons per shell=2, 8, 18, 23, 8, 2
  |phase=gó-tā̤
  |density gpcm3nrt=7.26
  |melting point K=1315
  |melting point C=1042
  |melting point F=1908
  |boiling point K=3273
  |boiling point C=3000
  |boiling point F=5432
  |heat fusion=7.13
  |heat vaporization=289
  |crystal structure=double hexagonal close packed
  |oxidation states='''3''', 2
  |oxidation states comment=(a&nbsp;mildly [[base (chemistry)|basic]] oxide)
  |electronegativity=1.13
  |electronegativity comment=(?)
  |number of ionization energies=3
  |ionization energy 1=540
  |ionization energy 2=1050
  |ionization energy 3=2150
  |atomic radius=183
  |covalent radius=199
  |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 Handbook of Chemistry and Physics 81st edition, CRC press.</ref>
  |electrical resistivity unit prefix=µ
  |electrical resistivity=est. 0.75
  |electrical resistivity comment=(at&nbsp;{{abbr|r.t.|room temperature}})
  |thermal conductivity=17.9
  |thermal expansion=9.0
  |thermal expansion ref=<ref>http://www.owlnet.rice.edu/~msci301/ThermalExpansion.pdf</ref>
  |thermal expansion comment=(at&nbsp;{{abbr|r.t.|room temperature}})
  |Young's modulus=α form: est. 46
  |Shear modulus=α form: est. 18
  |Bulk modulus=α form: est. 33
  |Poisson ratio=α form: est. 0.28
  |CAS number=7440-12-2
  |isotopes=
  {{infobox element/isotopes decay | mn=145 | sym=Pm
   | na=[[synthetic radioisotope|syn]] | hl=17.7&nbsp;y
   | dm=[[electron capture|ε]] | de=0.163 | link1=neodymium-145 | pn=145 | ps=Nd}}
  {{infobox element/isotopes decay2 | mn=146 | sym=Pm
   | na=syn | hl=5.53&nbsp;y
   | dm1=ε | de1=1.472 | link1=neodymium-146 | pn1=146 | ps1=Nd
   | dm2=[[beta emission|β<sup>−</sup>]] | de2=1.542 | link2=samarium-146 | pn2=146 | ps2=Sm}}
  {{infobox element/isotopes decay | mn=147 | sym=Pm
   | na=[[trace radioisotope|trace]] | hl=2.6234&nbsp;y
   | dm=β<sup>−</sup> | de=0.224 | link1=samarium-147 | pn=147 | ps=Sm}}
  |isotopes comment=
  |discovered by=[[Chien Shiung Wu]], [[Emilio Segrè]], [[Hans Bethe]]
  |discovery date=1942
  |first isolation by=[[Charles D. Coryell]], [[Jacob A. Marinsky]], [[Lawrence E. Glendenin]], [[Harold G. Richter]]
  |first isolation date=1945
  |named by=Grace Mary Coryell
  |named date=1945
  }}
  '''Promethium''' sê siŏh cṳ̄ng [[gĭng-sṳ̆k]], iâ sê siŏh cṳ̄ng [[huá-hŏk nguòng-só]].  [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 61, huá-hŏk hù-hô̤ sê Pm.
  ==Huá-hŏk séng-cék==
  
  ==Éng-ê̤ṳng==
  
  ==Cié-chṳ̄==
  
  ==Chăng-kō̤ cṳ̆-lâiu==
  {{reflist}}
  {{Ciŭ-gĭ-biēu}}
  {{Authority control}}
  [[分類:Huá-hŏk nguòng-só]]