Гелий (He)

элементи химиявӣ

Atomic Number	2
Atomic Weight	4.002602
Адади массавӣ	4

Group	18
Period	1
Block	s

proton	2 p⁺
neutron	2 n⁰
electron	2 e^-

Хусусияти Физикӣ

Atomic Radius	120 pm 134 pm
molar volume	31,8 cm³/mol
covalent radius	46 pm 28 pm
Metallic Radius	122 pm
ionic radius
Crystal Radius
Van der Waals radius	140 pm 140 pm 153 pm 236,2 pm
зичӣ	0,000164 g/cm³

Chemical Property

энергия

proton affinity	177,8 kJ/mol
electron affinity	-19,7 eV/particle
ionization energy	24,587387936 eV/particle 54,41776311 eV/particle

enthalpy of vaporization	0,08 kJ/mol
гармои гудозиш
standard enthalpy of formation
electron

Абри электронӣ	2

valence electron	2 ⓘ

electron configuration	1s²ⓘ

oxidation number
electronegativity	24,59 eV/particle 0.442712
Electrophilicity Index	0,0674191963846371 eV/particle
fundamental state of matter

phase of matter	Gas
gaseous state of matter	Monoatomic
Boiling Point	4,222 K
Melting Point
critical pressure	0,22746 MPa
critical temperature	5,195 K
triple point	2,177 K 5,043 kPa
appearance
Ранг	Colorless #ffc0cb #d9ffff #d9ffff
appearance	colorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field
refractive index	1,000035
thermodynamic material property
Thermal Conductivity	0,152 W/(m K)
thermal expansion
molar heat capacity	20,786 J/(mol K)
Specific Heat Capacity	5,193 Ҷ/(г⋅K)
heat capacity ratio	5/3
electrical properties
навъ
electrical conductivity
electrical resistivity
superconductivity
magnetism
навъ	diamagnetic
magnetic susceptibility (Mass)	-0,0000000059 m³/Kg
magnetic susceptibility (Molar)	-0,0000000000236 m³/mol
magnetic susceptibility (Volume)	-0,00000000105
magnetic ordering
Curie temperature
Néel temperature
сохт
Crystal Structure	Face Centered Cubic (HEX)
lattice constant	3,57 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound	970 m/s
classification
Category	Noble gases, Noble gases
CAS Group	VIII
IUPAC Group	VIIIA
Glawe Number	1
Mendeleev Number	112
Pettifor Number	1
Geochemical Class	volatile
Goldschmidt classification	atmophile

other

Gas Basicity	148,5 kJ/mol
polarizability	1,38375 ± 0,00002 a₀
C6 Dispersion Coefficient	1,42 a₀ 1,47 a₀
allotrope
Neutron cross section	0,007
Neutron Mass Absorption	0,00001
ададҳои квантӣ	1S0
space group	225 (Fm_3m)

Isotopes of Helium

Stable Isotopes	2
Unstable Isotopes	6
Natural Isotopes	2

³He

Адади массавӣ	3
neutron number	1
Relative Atomic Mass	3,01602932197 ± 0,00000000006 Da
g-factor	-4,25525062 ± 0,00000006
natural abundance	0,0002 ± 0,0002
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	1/2
nuclear quadrupole moment	0
таърихи кашф	1934
parity	+

⁴He

Адади массавӣ	4
neutron number	2
Relative Atomic Mass	4,00260325413 ± 0,00000000016 Da
g-factor	0
natural abundance	99,9998 ± 0,0002
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
таърихи кашф	1908
parity	+

⁵He

Адади массавӣ	5
neutron number	3
Relative Atomic Mass	5,012057224 ± 0,00002147 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	602 ± 22 ys
spin	3/2
nuclear quadrupole moment
таърихи кашф	1937
parity	-

decay mode	intensity
n (neutron emission)	100%

⁶He

Адади массавӣ	6
neutron number	4
Relative Atomic Mass	6,018885889 ± 0,000000057 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	806,92 ± 0,24 ms
spin	0
nuclear quadrupole moment	0
таърихи кашф	1936
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ d (β⁻-delayed deuteron emission)	0.000278%

⁷He

Адади массавӣ	7
neutron number	5
Relative Atomic Mass	7,027990652 ± 0,000008115 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	2,51 ± 0,07 zs
spin	3/2
nuclear quadrupole moment
таърихи кашф	1967
parity

decay mode	intensity
n (neutron emission)	100%

⁸He

Адади массавӣ	8
neutron number	6
Relative Atomic Mass	8,033934388 ± 0,000000095 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	119,5 ± 1,5 ms
spin	0
nuclear quadrupole moment	0
таърихи кашф	1965
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	16%
β⁻ t (β⁻-delayed triton emission)	0.9%

⁹He

Адади массавӣ	9
neutron number	7
Relative Atomic Mass	9,043946414 ± 0,000050259 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	2,5 ± 2,3 zs
spin	1/2
nuclear quadrupole moment	0
таърихи кашф	1987
parity

decay mode	intensity
n (neutron emission)	100%

¹⁰He

Адади массавӣ	10
neutron number	8
Relative Atomic Mass	10,052815306 ± 0,000099676 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	260 ± 40 ys
spin	0
nuclear quadrupole moment	0
таърихи кашф	1994
parity	+

decay mode	intensity
2n (2-neutron emission)	100%

таърих

кошиф	Sir William Ramsey, Nils Langet, P.T.Cleve
макони кашф	Scotland/Sweden
таърихи кашф	1895
Решашиносӣ	Greek: hêlios (sun).
pronunciation	HEE-li-em (Англисӣ)

source

Abundance
Abundance in Earth's crust	0,008 mg/kg
natural abundance (Уқёнус)	0,000007 mg/L
natural abundance (human body)
natural abundance (meteoroid)
natural abundance (Офтоб)	23 %
Abundance in Universe	23 %

Nuclear Screening Constants

0.3125

Гелий on ChemicalAid

ATC code	V03AN03
Australian Educational Vocabulary ID	scot/3528
Brockhaus Enzyklopädie online ID	helium-20
CAB ID	178029
CAS Registry Number	7440-59-7
ChEBI ID	30217
ChEMBL ID	CHEMBL1796997
ChemSpider ID	22423
Common Procurement Vocabulary	24111300
DSSTOX compound identifier	DTXCID5016402
DSSTox substance ID	DTXSID7036402
De Agostini ID	èlio
Den Store Danske ID	helium
DrugBank ID	09155
ECHA Substance Infocard ID	100.028.334
Encyclopædia Universalis ID	helium
E number	E939
French Vikidia ID	Hélium
Golden ID	Helium-K8NB
Great Russian Encyclopedia Online ID	2348591
HSDB ID	553
ICSC ID	0603
InChI	InChI=1S/He
InChIKey	SWQJXJOGLNCZEY-UHFFFAOYSA-N
Italian Vikidia ID	Elio
KBpedia ID	Helium
Klexikon article ID	Helium
Krugosvet article	nauka_i_tehnika/himiya/GELI.html
Mindat mineral ID	25563
NALT ID	44987
NDF-RT ID	N0000147379
NDL Authority ID	00563132
NE.se ID	helium
Namuwiki ID	헬륨
National Library of Israel J9U ID	987007555644805171
Online PWN Encyclopedia ID	3910758
OpenAlex ID	C546029482
OpenAlex ID	C2991909631
Probes And Drugs ID	PD009020
PubChem CID	23987
RxNorm ID	5140
Römpp online ID	RD-08-00783
Spanish Vikidia ID	Helio
Store norske leksikon ID	helium
Treccani ID	elio
U.S. National Archives Identifier	10640583
UMLS CUI	C0018880
UNII	206GF3GB41
USGS Thesaurus ID	1470
WordNet 3.1 Synset ID	14664099-n
World of Physics ID	Helium
YSO ID	14499
ZVG number	7020
коди BNF	11978648w
коди LCNAF	sh85060043
мазмун дар ОмегаВики	7296
рамзи BNCF	19752
рамзи MeSH	D006371
рамзи NKC	ph503003
рамзи PSH	5816
шиносаи Freebase	/m/025rt79
шиносаи GND	4132459-6
шиносаи донишномаи «Британника онлайн»	science/helium-chemical-element
шиносаи мазӯъии Quora	Helium

Гелий (He)

Хусусияти Физикӣ

Chemical Property

other

Isotopes of Helium

3He

4He

5He

6He

7He

8He

9He

10He

таърих

source

Nuclear Screening Constants

³He

⁴He

⁵He

⁶He

⁷He

⁸He

⁹He

¹⁰He