text: # Să̤ (gó-tā̤)
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Să̤ (硒) sê siŏh cṳ̄ng hĭ-gĭng-sṳ̆k nguòng-só. Nguòng-cṳ̄ sê̤ṳ-só sê 34, huá-hŏk hù-hô̤ sê Se.
title: Să̤ (gó-tā̤)
wikitext: {{twinLAT|硒}}
  {{Infobox element
  |number=34
  |symbol=Se
  |name=Sele­n
  |enname=selenium
  |laname=selenium
  |left=[[Piĕ (nguòng-só)|Piĕ]]
  |right=[[Chéu (nguòng-só)|Chéu]]
  |above=[[Liù-uòng]]
  |below=[[Dá̤ (nguòng-só)|Telua]]
  |series=hĭ-gĭng-sṳ̆k
  |series comment=sometimes considered a [[metalloid]]
  |group=16
  |period=4
  |block=p
  |image name=SeBlackRed.jpg
  |appearance=black, red, and gray (not pictured) allotropes
  |atomic mass=78.971
  |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=8
  |atomic mass comment=
  |electron configuration=&#91;[[argon|Ar]]&#93; 3d<sup>10</sup> 4s<sup>2</sup> 4p<sup>4</sup>
  |electrons per shell=2, 8, 18, 6
  |phase=gó-tā̤
  |density gpcm3nrt=gray: 4.81
  |density gpcm3nrt 2=alpha: 4.39
  |density gpcm3nrt 3=vitreous: 4.28
  |density gpcm3mp=3.99
  |melting point K=494
  |melting point C=221
  |melting point F=430
  |boiling point K=958
  |boiling point C=685
  |boiling point F=1265
  |critical point K=1766
  |critical point MPa=27.2
  |heat fusion=gray: 6.69
  |heat vaporization=95.48
  |heat capacity=25.363
  |vapor pressure 1=500
  |vapor pressure 10=552
  |vapor pressure 100=617
  |vapor pressure 1 k=704
  |vapor pressure 10 k=813
  |vapor pressure 100 k=958
  |vapor pressure comment=
  |crystal structure=hexagonal
  |oxidation states='''6''', 5, '''4''', 3, '''2''', 1,<ref>{{Greenwood&Earnshaw}}</ref> −1, '''−2'''
  |oxidation states comment=(a strongly [[acid]]ic oxide)
  |electronegativity=2.55
  |number of ionization energies=3
  |ionization energy 1=941.0
  |ionization energy 2=2045
  |ionization energy 3=2973.7
  |atomic radius=120
  |covalent radius=120±4
  |Van der Waals radius=190
  |magnetic ordering=[[diamagnetic]]
  |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>
  |thermal conductivity=amorphous: 0.519
  |thermal expansion at 25=amorphous: 37
  |speed of sound rod at 20=3350
  |Young's modulus=10
  |Shear modulus=3.7
  |Bulk modulus=8.3
  |Poisson ratio=0.33
  |Mohs hardness=2.0
  |Brinell hardness=736
  |CAS number=7782-49-2
  |isotopes=
  {{infobox element/isotopes decay2 | mn=72 | sym=Se | na=[[synthetic radioisotope|syn]] | hl=8.4&nbsp;d | dm1=[[electron capture|ε]] | de1=– | link1=arsenic-72 | pn1=72 | ps1=As | dm2=[[gamma radiation|γ]] | de2=0.046 | pn2= | ps2=–}}
  {{infobox element/isotopes decay | mn=74 | sym=Se | na=0.87% | hl=– | dm=([[double beta decay|β<sup>+</sup>β<sup>+</sup>]]) | de=1.2094 | link1=germanium-74 | pn=74 | ps=Ge }}
  {{infobox element/isotopes decay2 | mn=75 | sym=Se | na=syn | hl=119.779&nbsp;d | dm1=ε | de1=– | link1=arsenic-75 | pn1=75 | ps1=As | dm2=γ | de2=0.264, 0.136,<br/>0.279 | pn2= | ps2=–}}
  {{Infobox element/isotopes stable | mn=76 | sym=Se | na=9.36% | n=42 |firstlinks=yes}}
  {{Infobox element/isotopes stable | mn=77 | sym=Se | na=7.63% | n=43 |firstlinks=no}}
  {{Infobox element/isotopes stable | mn=78 | sym=Se | na=23.78% | n=44 |firstlinks=no}}
  {{infobox element/isotopes decay | mn=79 | sym=Se | na=[[trace radioisotope|trace]] | hl=3.27&times;10<sup>5</sup>&nbsp;y | dm=[[beta decay|β<sup>−</sup>]] | de=0.151 |link1=bromine-79 | pn=79 | ps=Br}}
  {{infobox element/isotopes decay | mn=80 | sym=Se | na=49.61% | hl=– | dm=([[double beta decay|β<sup>−</sup>β<sup>−</sup>]]) | de=0.1339 | link1=krypton-80 | pn=80 | ps=Kr }}
  {{infobox element/isotopes decay | mn=82 | sym=Se | na=8.73% | hl=1.08&times;10<sup>20</sup>&nbsp;y | dm=β<sup>−</sup>β<sup>−</sup> | de=2.995 | link1=krypton-82 | pn=82 | ps=Kr}}
  |isotopes comment=Decay modes in parentheses are predicted, but have not yet been observed
  |naming=after [[Selene]], Greek goddess of the moon
  |discovery and first isolation by=[[Jöns Jakob Berzelius]] and [[Johann Gottlieb Gahn]]
  |discovery date=1817
  }}
  '''Să̤''' (硒) sê siŏh cṳ̄ng [[hĭ-gĭng-sṳ̆k]] [[huá-hŏk nguòng-só|nguòng-só]]. [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 34, huá-hŏk hù-hô̤ sê Se.
  ==Huá-hŏk séng-cék==
  
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  [[分類:Huá-hŏk nguòng-só]]