Template:Infobox helium/sandbox
{{Infobox
| headerstyle = background:#c0ffff
| labelstyle = padding-right:0.75em;
| datastyle =
| belowstyle = background:#c0ffff
| title = Helium, 2He
| image1 =
| caption1 =
| image2 =
| caption2 = Spectral lines of helium| header10 = General properties
| label11 = Pronunciation
| data11 = /ˈhiːliəm/
Template:Respell
| label12 = Proposed formal name
| data12 =
| label13 = Alternative name
| data13 =
| label14 = Allotropes
| data14 =
| label15 = Appearance
| data15 = colorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field
| label16 = Standard atomic weight (Ar) | data16 = Template:Val[1] | label17 = Mass number | data17 = | label18 = Abundance | data18 = | data19 = | header20 = Helium in the periodic table | data22 =
|
| label23 = Atomic number (Z) | data23 = 2
| label24 = Group, period | data24 = group 18 (noble gases), period 1 | label25 = Block | data25 = s-block
| label26 = Element category | data26 = noble gas
| label31 = Electron configuration | data31 = 1s2
| label32 =
| data32 = 2
|header40 = Physical properties | data41 = | data42 =
References
- ↑ Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
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