User:Patrick/Template:Infobox helium/doc
Appearance
![]() | This is a documentation subpage for User:Patrick/Template:Infobox helium. It may contain usage information, categories and other content that is not part of the original user template page. |
Usage
[edit]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 | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pronunciation | /ˈhiːliəm/ | ||||||||||||||||||||
Appearance | Colorless gas, exhibiting a purple glow when placed in a high voltage electric field | ||||||||||||||||||||
Standard atomic weight Ar°(He) | |||||||||||||||||||||
Helium in the periodic table | |||||||||||||||||||||
| |||||||||||||||||||||
Group | group 18 (noble gases) | ||||||||||||||||||||
Period | 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)
| |||||||||||||||||||||
Atomic properties | |||||||||||||||||||||
Oxidation states | 0 | ||||||||||||||||||||
Electronegativity | Pauling scale: no data | ||||||||||||||||||||
Covalent radius | 28 pm | ||||||||||||||||||||
Van der Waals radius | 140 pm | ||||||||||||||||||||
![]() | |||||||||||||||||||||
Other properties | |||||||||||||||||||||
Natural occurrence | primordial | ||||||||||||||||||||
Crystal structure | hexagonal close-packed (hcp) | ||||||||||||||||||||
Thermal conductivity | 0.1513 W/(m⋅K) | ||||||||||||||||||||
Magnetic ordering | diamagnetic[3] | ||||||||||||||||||||
Speed of sound | 972 m/s | ||||||||||||||||||||
CAS Number | 7440-59-7 | ||||||||||||||||||||
Isotopes of helium | |||||||||||||||||||||
| |||||||||||||||||||||
{{User:Patrick/Template:Infobox helium|User:Patrick/pstp|p=symbol}}
→ He
References
- ^ "Standard Atomic Weights: Helium". CIAAW. 1983.
- ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
- ^ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
- ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.