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helium (Q560)

From Wikidata
chemical element with symbol He and atomic number 2; rare gas; noble gas
  • element 2
Language Label Description Also known as
default for all languages
He
  • ₂He
English
helium
chemical element with symbol He and atomic number 2; rare gas; noble gas
  • element 2

Statements

subclass of
nonmetal
0 references
s-block
0 references
image
Helium discharge tube.jpg
3,008 × 2,008; 1.29 MB
0 references
named after
Helios
0 references
electronegativity
4.5
0 references
ionization energy
24.587389011±0.000000025 electronvolt
series ordinal
1
1 reference
reference URL
https://physics.nist.gov/asd
title
NIST Atomic Spectra Database, Ionization Energies (English)
retrieved
18 September 2026
54.4177655282±0.000000001 electronvolt
series ordinal
2
1 reference
reference URL
https://physics.nist.gov/asd
title
NIST Atomic Spectra Database, Ionization Energies (English)
retrieved
18 September 2026
antiparticle
antihelium
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density
0.1785 kilogram per cubic metre
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melting point
no value
under pressure
1 standard atmosphere
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0.95 kelvin
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−272.05 degree Celsius
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−458 degree Fahrenheit
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boiling point
−452.070 degree Fahrenheit
0 references
−268.9 degree Celsius
under pressure
1 standard atmosphere
1 reference
imported from Wikimedia project
French Wikipedia
speed of sound
180±1 metre per second
temperature
−268.9±0.1 degree Celsius
state of matter
liquid
1 reference
stated in
CRC Handbook of Chemistry and Physics (78th edition)
page(s)
14-37
965±1 metre per second
temperature
0±1 degree Celsius
state of matter
gas
1 reference
stated in
CRC Handbook of Chemistry and Physics (78th edition)
page(s)
14-37
refractive index
1.000036
temperature
0 degree Celsius
under pressure
1 standard atmosphere
wavelength
589.29 nanometre
1 reference
imported from Wikimedia project
list of refractive indices
French Wikipedia
schematic
Electron shell de 002 Helium.svg
800 × 860; 1 KB
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Commons gallery
Helium
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Commons category
Helium
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atomic radius
120 picometre
1 reference
DOI
10.1063/1.1725697
retrieved
3 October 2026
covalent radius
28 picometre
1 reference
DOI
10.1039/B801115J
retrieved
3 October 2026
Van der Waals radius
140 picometre
1 reference
DOI
10.1021/J100785A001
retrieved
3 October 2026

Identifiers

J9U entity ID
987007555644805171
subject named as (monolingual text)
Helium (English)
הליום (Hebrew)
الهيليوم (Arabic)
1 reference
stated in
National Library of Israel
NDL Authority ID
00563132
0 references
NL CR AUT ID
ph503003
subject named as
helium
0 references
COD ID
9011639
0 references
ICSC ID
0603
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CAMEO Chemicals ID
3548
0 references
HSDB ID
553
1 reference
stated in
Hazardous Substances Data Bank
HSDB ID
553
publication date
28 October 2019
title
HELIUM (English)
retrieved
10 May 2021
E number
E939
0 references
Mindat mineral ID
25563
0 references
ATC code
V03AN03
0 references
Arabic Ontology lexical concept ID
151078473
subject named as
He | atomic number 2 | helium
scope note
a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) (English)
0 references
BabelNet ID
00006849n
0 references
CAB ID
178029
1 reference
stated in
CABI Thesaurus
retrieved
6 April 2020
Harper's tag
helium
0 references
KBpedia ID
Helium
1 reference
stated in
KBpedia
retrieved
9 July 2020
Lex ID
helium
0 references
NALT ID
44987
0 references
Namuwiki ID
헬륨
0 references
NE.se ID
helium
0 references
PM20 ware ID
142944
subject named as
Helium
0 references
PSH ID
5816
0 references
Quora topic ID
Helium
0 references
RationalWiki ID
Helium
0 references
Treccani ID
elio
subject named as
elio
0 references
USGS Thesaurus ID
1470
0 references
Vikidia article ID
it:Elio
0 references
es:Helio
0 references
fr:Hélium
0 references
WikiKids ID
Helium
MediaWiki page ID
29347
0 references
WordNet 3.1 Synset ID
14664099-n
subject named as
He, atomic number 2, helium
scope note
a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) (English)
1 reference
stated in
GF WordNet
YSO ID
14499
subject named as (monolingual text)
helium (Northern Sami)
helium (Swedish)
helium (Finnish)
helium (English)
1 reference
stated in
YSO-Wikidata mapping project
 
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