text: # Neptunium
  Chăng-kō̤ Mìng-dĕ̤ng-ngṳ̄ Háng-cê gì bēng-buōng. / 參考閩東語漢字其版本。
  Neptunium sê siŏh cṳ̄ng gĭng-sṳ̆k, iâ sê siŏh cṳ̄ng huá-hŏk nguòng-só.  Nguòng-cṳ̄ sê̤ṳ-só sê 93, huá-hŏk hù-hô̤ sê Np.
  
title: Neptunium
wikitext: {{twinLAT|鎿}}
  {{Infobox element
  |number=93
  |symbol=Np
  |name=Neptuni
  |enname=neptunium
  |laname=neptunium
  |left=[[Iù (gĭng-sṳ̆k)|urani]]
  |right=[[plutonium|Plutoni]]
  |above=[[promethium|Promethi]]
  |below=(Uqp)
  |series=actinium-hiê
  |period=7
  |block=f
  |group=n/a
  |image name=neptunium2.jpg
  |appearance=silvery metallic
  |atomic mass=(237)
  |electron configuration=&#91;[[radon|Rn]]&#93; 5f<sup>4</sup> 6d<sup>1</sup> 7s<sup>2</sup>
  |electrons per shell=2, 8, 18, 32, 22, 9, 2
  |phase=gó-tā̤
  |density gpcm3nrt=alpha: 20.45
  |density gpcm3nrt ref=<ref name="criticality">{{cite web
  |url=http://typhoon.jaea.go.jp/icnc2003/Proceeding/paper/2.14_107.pdf
  |title=Criticality of a <sup>237</sup>Np Sphere
  |first1=Rene G.
  |last1=Sanchez
  |first2=David J.
  |last2=Loaiza
  |first3=Robert H.
  |last3=Kimpland
  |first4=David K.
  |last4=Hayes
  |first5=Charlene C.
  |last5=Cappiello
  |first6=William L.
  |last6=Myers
  |first7=Peter J.
  |last7=Jaegers
  |first8=Steven D.
  |last8=Clement
  |first9=Kenneth B.
  |last9=Butterfield
  |publisher=Japanese Atomic Energy Agency
  |accessdate=2014-08-06
  |archive-date=2014-05-12
  |archive-url=https://web.archive.org/web/20140512214219/http://typhoon.jaea.go.jp/icnc2003/Proceeding/paper/2.14_107.pdf
  |deadurl=yes
  }}</ref>
  |density gpcm3nrt 2=accepted standard value: 19.38
  |melting point K=912±3
  |melting point C=639±3
  |melting point F=1182±5
  |boiling point K=4447
  |boiling point C=4174
  |boiling point F=7545
  |boiling point comment=''(extrapolated)''
  |heat fusion=5.19
  |heat vaporization=336
  |heat capacity=29.46
  |vapor pressure 1=2194
  |vapor pressure 10=2437
  |vapor pressure 100=
  |vapor pressure 1 k=
  |vapor pressure 10 k=
  |vapor pressure 100 k=
  |vapor pressure comment=
  |crystal structure=orthorhombic
  |oxidation states=7, 6, '''5''', 4, 3, 2
  |oxidation states comment=(an [[amphoterism|amphoteric]] oxide)
  |electronegativity=1.36
  |number of ionization energies=1
  |ionization energy 1=604.5
  |atomic radius=155
  |covalent radius=190±1
  |magnetic ordering=[[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 Handbook of Chemistry and Physics 81st edition, CRC press.</ref>
  |electrical resistivity unit prefix=µ
  |electrical resistivity=1.220
  |electrical resistivity comment=(at&nbsp;22&nbsp;°C)
  |thermal conductivity=6.3
  |CAS number=7439-99-8
  |isotopes=
  {{infobox element/isotopes decay2 | mn=235 | sym=Np
   | na=[[synthetic radioisotope|syn]] | hl=[[1 E7 s|396.1&nbsp;d]]
   | dm1=[[alpha emission|α]] | de1=5.192 | link1=protactinium-231 | pn1=231 | ps1=Pa
   | dm2=[[electron capture|ε]] | de2=0.124 | link2=uranium-235 | pn2=235 | ps2=U}}
  {{infobox element/isotopes decay3 | mn=236 | sym=Np
   | na=syn | hl=[[1 E12 s|1.54&times;10<sup>5</sup>&nbsp;y]]
   | dm1=ε | de1=0.940 | link1=uranium-236 | pn1=236 | ps1=U
   | dm2=[[beta emission|β<sup>−</sup>]] | de2=0.940 | link2=plutonium-236 | pn2=236 | ps2=Pu
   | dm3=α | de3=5.020 | link3=protactinium-232 | pn3=232 | ps3=Pa}}
  {{infobox element/isotopes decay | mn=237 | sym=Np
   | na=[[trace radioisotope|trace]] | hl=2.144&times;10<sup>6</sup>&nbsp;y
   | dm=α | de=4.959 | link1=protactinium-233 | pn=233 | ps=Pa}}
  {{infobox element/isotopes decay | mn=239 | sym=Np
   | na=trace | hl=2.356&nbsp;d
   | dm=β<sup>−</sup> | de=0.218 | link1=plutonium-239 | pn=239 | ps=Pu}}
  |isotopes comment=
  |naming=after planet [[Neptune]], itself named after Roman god of the sea [[Neptune (mythology)|Neptune]]
  |discovered by=[[Edwin McMillan]] and [[Philip H. Abelson]]
  |discovery date=1940
  }}
  '''Neptunium''' sê siŏh cṳ̄ng [[gĭng-sṳ̆k]], iâ sê siŏh cṳ̄ng [[huá-hŏk nguòng-só]].  [[Nguòng-cṳ̄ sê̤ṳ-só]] sê 93, huá-hŏk hù-hô̤ sê Np.
  ==Huá-hŏk séng-cék==
  
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  ==Cié-chṳ̄==
  
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  [[分類:Huá-hŏk nguòng-só]]