User:Patrick/Template:Infobox helium

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Adapted from Template:Infobox helium by just modifying the first line. See also Wikipedia talk:WikiProject Elements#Making the data in the infoboxes independently retrievable.

{{User:Patrick/Template:Infobox helium|Elementbox}} gives the infobox on the right.

Helium,  2He
Helium-glow.jpg
General properties
Pronunciation /ˈhliəm/ HEE-lee-əm
Appearance Colorless gas, exhibiting a purple glow when placed in a high voltage electric field
Standard atomic weight (Ar, standard) 4.002602(2)
Helium in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
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He

Ne
hydrogenheliumlithium
Atomic number (Z) 2
Group, period group 18 (noble gases), period 1
Block s-block
Electron configuration 1s2
Electrons per shell
2
Physical properties
Phase (at STP) gas
Melting point (at 2.5 MPa) 0.95 K ​(−272.20 °C, ​−457.96 °F)
Boiling point 4.22 K ​(−268.93 °C, ​−452.07 °F)
Density (at STP) 0.1786 g/L
when liquid (at m.p.) 0.145 g/cm3
Critical point 5.19 K, 0.227 MPa
Heat of fusion 0.0138 kJ/mol
Heat of vaporization 0.0829 kJ/mol
Molar heat capacity 20.786 J/(mol·K)
Vapor pressure (defined by ITS-90)
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K)     1.23 1.67 2.48 4.21
Atomic properties
Electronegativity Pauling scale: no data
Covalent radius 28 pm
Van der Waals radius 140 pm
Color lines in a spectral range
Miscellanea
Crystal structure hexagonal close-packed (hcp)
Hexagonal close-packed crystal structure for helium
Speed of sound 972 m/s
Thermal conductivity 0.1513 W/(m·K)
Magnetic ordering diamagnetic[1]
CAS Number 7440-59-7
Main isotopes of helium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
3He 0.000137%* stable
4He 99.999863%* stable
  • Atmospheric value, abundance may differ elsewhere.
| references | in Wikidata

{{User:Patrick/Template:Infobox helium|pstp|p=symbol}} → He


References

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