Editing Template:Infobox helium

{{Infobox element
|name=helium
|number=2
|symbol=He
|abundance=
|abundance in earth's crust=
|abundance in oceans=
|abundance in solar system=
|left=[[hydrogen]]
|right=[[lithium]]
|above=–
|below=[[neon|Ne]]
|category=noble gas
|category comment=
|group=18
|period=1
|block=s
|appearance=colorless gas, exhibiting a red-orange glow when placed in an electric field
|image name=Helium discharge tube.jpg
|electron configuration=1s<sup>2</sup>
|electrons per shell=2
|phase=gas
|phase comment=
|density gplstp=0.1786
|density gpcm3nrt=
|density gpcm3bp=0.125
|density gpcm3mp=0.145
|melting point K=0.95
|melting point C=−272.20
|melting point F=−457.96
|melting point comment=(at&nbsp;2.5&nbsp;MPa)
|boiling point K=4.222
|boiling point C=−268.928
|boiling point F=−452.070
|triple point K=2.177
|triple point kPa=5.043
|critical point K=5.1953
|critical point MPa=0.22746
|heat fusion=0.0138
|heat vaporization=0.0829
|heat capacity=20.78
|heat capacity ref=<ref>Shuen-Chen Hwang, Robert D. Lein, Daniel A. Morgan (2005). "Noble Gases". ''Kirk Othmer Encyclopedia of Chemical Technology''. Wiley. pp. 343–383. [[doi:10.1002/0471238961.0701190508230114.a01]].</ref>
|vapor pressure 1=&nbsp;
|vapor pressure 10=&nbsp;
|vapor pressure 100=1.23
|vapor pressure 1 k=1.67
|vapor pressure 10 k=2.48
|vapor pressure 100 k=4.21
|vapor pressure comment=(defined by [[International Temperature Scale of 1990|ITS-90]])
|crystal structure=hexagonal close-packed
|oxidation states='''0'''
|oxidation states comment=
|electronegativity=no data
|number of ionization energies=2
|ionization energy 1=2372.3
|ionization energy 2=5250.5
|ionization energy 3=
|atomic radius=
|atomic radius calculated=
|covalent radius=28
|Van der Waals radius=140
|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 Handbook of Chemistry and Physics 81st edition, CRC press.</ref>
|electrical resistivity=
|electrical resistivity at 0=
|electrical resistivity at 20=
|thermal conductivity=0.1513
|thermal conductivity 2=
|thermal diffusivity=
|thermal expansion=
|thermal expansion at 25=
|speed of sound=972
|speed of sound rod at 20=
|speed of sound rod at r.t.=
|magnetic susceptibility= &minus;1.88·10<sup>−6</sup> 
|magnetic susceptibility ref= &#x20;(298&nbsp;K)<ref>{{Cite book|title=CRC, Handbook of Chemistry and Physics|last=Weast|first=Robert|publisher=Chemical Rubber Company Publishing|year=1984|isbn=0-8493-0464-4|location=Boca Raton, Florida|pages=E110|quote=|via=}}</ref>
|Young's modulus=
|Shear modulus=
|Bulk modulus=
|Poisson ratio=
|Mohs hardness=
|Vickers hardness=
|Brinell hardness=
|CAS number=7440-59-7
|isotopes=
{{Infobox element/isotopes stable | mn=3 | sym=He | na=0.0002% | n=1 | link=Helium-3 |firstlinks=yes}}
{{Infobox element/isotopes stable | mn=4 | sym=He | na=99.9998% | n=2 | link=Helium-4 |firstlinks=no}}
|isotopes comment=
|naming=after [[Helios]], Greek [[Titan (mythology)|Titan]] of the Sun
|predicted by=
|prediction date=
|discovered by=[[Pierre Janssen]], [[Norman Lockyer]]
|discovery date=1868
|first isolation by=[[William Ramsay]], [[Per Teodor Cleve]], [[Abraham Langlet]]
|first isolation date=1895
|QID=Q560
}}<!--

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{{Infobox element/element navigation|symbol=He}}
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*<nowiki><ref name="CIAAW2016" /</nowiki>> for the source ''Atomic weights of the elements 2013'' (from subtemplates used by {{tl|Infobox element}})
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