Template:Infobox helium/sandbox

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{{Infobox | headerstyle = background:#c0ffff | labelstyle = padding-right:0.75em; | datastyle = | belowstyle = background:#c0ffff | title = Helium,  2He | image1 = Helium discharge tube.jpg | caption1 = | image2 = Helium spectra.jpg | caption2 = Spectral lines of helium| header10 = General properties | label11 = Pronunciation | data11 = /ˈhliəm/
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 =

Template:Periodic table (32 columns, micro) -

He

Ne
hydrogenheliumlithium

| 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 =

Electrons per shell

| data32 = 2

|header40 = Physical properties | data41 = | data42 =

References

  1. 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.
  2. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.

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