Argon (Ar)

chemical element with symbol Ar and atomic number 18; rare gas

Atomic Number	18
Atomic Weight	39.948
Numri i masës	40

Group	18
Period	3
Block	p

protoni	18 p⁺
neutroni	22 n⁰
elektroni	18 e^-

Tipar Fizik

Atomic Radius	71 pm 197 pm
molar volume	24,2 cm³/mol
covalent radius	96 pm 107 pm 96 pm 106 pm
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius	188 pm 188 pm 199 pm 386,8 pm
density	0,001633 g/cm³

Chemical Property

energjia

proton affinity	369,2 kJ/mol
electron affinity	-11,5 eV/particle
ionization energy	15,7596112 eV/particle 27,62967 eV/particle 40,735 eV/particle 59,58 eV/particle 74,84 eV/particle 91,29 eV/particle 124,412 eV/particle 143,4567 eV/particle 422,598 eV/particle 479,76 eV/particle 540,43 eV/particle 618,95 eV/particle 685,47 eV/particle 755,13 eV/particle 855,47 eV/particle 918,374 eV/particle 4 120,6655 eV/particle 4 426,2227 eV/particle

enthalpy of vaporization	6,52 kJ/mol
enthalpy of fusion
standard enthalpy of formation
elektroni

electron shell	2, 8, 8

valence electron	8 ⓘ

konfigurimi i elektronit	[Ne] 3s² 3p⁶ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶

oxidation number	0
Elektronegativiteti	19,17 eV/particle 0.2922
Electrophilicity Index	0,0832013314590371 eV/particle
fundamental state of matter

gjendja agregate e materies	Gas
gaseous state of matter	Monoatomic
Boiling Point	87,302 K
Melting Point	83,81 K
critical pressure	4,863 MPa
critical temperature	150,687 K
triple point	83,8058 K 68,89 kPa
appearance
Ngjyra	Colorless #ff1493 #80d1e3 #80d1e3
appearance	colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
refractive index	1,000281
thermodynamic material property
Thermal Conductivity	0,0177 W/(m K)
thermal expansion
molar heat capacity	20,786 J/(mol K)
Specific Heat Capacity	0,52 J/(g⋅K)
heat capacity ratio	5/3
electrical properties
type
electrical conductivity
electrical resistivity
Superpërcjellshmëria
Magnetizimi
type	diamagnetic
magnetic susceptibility (Mass)	-0,000000006 m³/Kg
magnetic susceptibility (Molar)	-0,00000000024 m³/mol
magnetic susceptibility (Volume)	-0,0000000107
magnetic ordering
Curie temperature
Néel temperature
strukturë
Crystal Structure	Face Centered Cubic (FCC)
lattice constant	5,26 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Shpejtësia e zërit	319 m/s
klasifikim
Category	Noble gases, Noble gases
CAS Group	VIII
IUPAC Group	VIIIA
Glawe Number	3
Mendeleev Number	114
Pettifor Number	3
Geochemical Class	volatile
Goldschmidt classification	atmophile

other

Gas Basicity	346,3 kJ/mol
polarizability	11,083 ± 0,007 a₀
C6 Dispersion Coefficient	64,2 a₀ 67,4 a₀
allotrope
Neutron cross section	0,66
Neutron Mass Absorption	0,00059
numër kuantik	1S0
space group	225 (Fm_3m)

Isotopes of Argon

Stable Isotopes	2
Unstable Isotopes	24
Natural Isotopes	3

²⁹Ar

Numri i masës	29
numri i neutroneve	11
Relative Atomic Mass	29,040761 ± 0,000471 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2018
parity	+

decay mode	intensitet
2p (2-proton emission)	100%

³⁰Ar

Numri i masës	30
numri i neutroneve	12
Relative Atomic Mass	30,023694 ± 0,000192 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	2015
parity	+

decay mode	intensitet
2p (2-proton emission)	100%

³¹Ar

Numri i masës	31
numri i neutroneve	13
Relative Atomic Mass	31,012158 ± 0,000215 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	15 ± 0,3 ms
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1986
parity	+

decay mode	intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	68.3%
2p (2-proton emission)	9%
B+pA	0.38%
3p	0.07%
β⁺α (β⁺-delayed α emission)	0.03%
2p (2-proton emission)	0.0006%

³²Ar

Numri i masës	32
numri i neutroneve	14
Relative Atomic Mass	31,997637824 ± 0,0000019 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	98 ± 2 ms
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1977
parity	+

decay mode	intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	35.58%

³³Ar

Numri i masës	33
numri i neutroneve	15
Relative Atomic Mass	32,989925545 ± 0,00000043 Da
g-factor	-1,446 ± 0,012
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	173 ± 2 ms
Spini	1/2
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1964
parity	+

decay mode	intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	38.7%

³⁴Ar

Numri i masës	34
numri i neutroneve	16
Relative Atomic Mass	33,980270092 ± 0,000000083 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	846,46 ± 0,35 ms
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1966
parity	+

decay mode	intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

³⁵Ar

Numri i masës	35
numri i neutroneve	17
Relative Atomic Mass	34,975257719 ± 0,00000073 Da
g-factor	0,42133333333333 ± 0,00013333333333333
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,7756 ± 0,001 s
Spini	3/2
nuclear quadrupole moment	-0,084 ± 0,015
koha e zbulimit apo shpikjes	1940
parity	+

decay mode	intensitet
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

³⁶Ar

Numri i masës	36
numri i neutroneve	18
Relative Atomic Mass	35,967545106 ± 0,000000028 Da
g-factor	0
natural abundance	0,3336 ± 0,021
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1920
parity	+

decay mode	intensitet
2β⁺ (double β⁺ decay)

³⁷Ar

Numri i masës	37
numri i neutroneve	19
Relative Atomic Mass	36,966776301 ± 0,000000221 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	35,011 ± 0,019 d
Spini	3/2
nuclear quadrupole moment	0,076 ± 0,003
koha e zbulimit apo shpikjes	1941
parity	+

decay mode	intensitet
ϵ (electron capture)	100%

³⁸Ar

Numri i masës	38
numri i neutroneve	20
Relative Atomic Mass	37,962732102 ± 0,000000209 Da
g-factor	0
natural abundance	0,0629 ± 0,007
Radioaktivitet	stable isotope
half-life	Not Radioactive ☢️
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1934
parity	+

³⁹Ar

Numri i masës	39
numri i neutroneve	21
Relative Atomic Mass	38,964313037 ± 0,000005367 Da
g-factor	-0,45428571428571 ± 0,0042857142857143
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	268 ± 8 y
Spini	7/2
nuclear quadrupole moment	-0,116 ± 0,002
koha e zbulimit apo shpikjes	1950
parity	-

decay mode	intensitet
β⁻ (β⁻ decay)	100%

⁴⁰Ar

Numri i masës	40
numri i neutroneve	22
Relative Atomic Mass	39,96238312204 ± 0,00000000234 Da
g-factor	0
natural abundance	99,6035 ± 0,025
Radioaktivitet	stable isotope
half-life	Not Radioactive ☢️
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1920
parity	+

⁴¹Ar

Numri i masës	41
numri i neutroneve	23
Relative Atomic Mass	40,96450057 ± 0,000000372 Da
g-factor	-0,37428571428571 ± 0,0022857142857143
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	109,61 ± 0,04 m
Spini	7/2
nuclear quadrupole moment	-0,042 ± 0,004
koha e zbulimit apo shpikjes	1936
parity	-

decay mode	intensitet
β⁻ (β⁻ decay)	100%

⁴²Ar

Numri i masës	42
numri i neutroneve	24
Relative Atomic Mass	41,963045737 ± 0,0000062 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	32,9 ± 1,1 y
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1952
parity	+

decay mode	intensitet
β⁻ (β⁻ decay)	100%

⁴³Ar

Numri i masës	43
numri i neutroneve	25
Relative Atomic Mass	42,965636056 ± 0,0000057 Da
g-factor	-0,4088 ± 0,0024
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	5,37 ± 0,06 m
Spini	5/2
nuclear quadrupole moment	0,142 ± 0,014
koha e zbulimit apo shpikjes	1969
parity

decay mode	intensitet
β⁻ (β⁻ decay)	100%

⁴⁴Ar

Numri i masës	44
numri i neutroneve	26
Relative Atomic Mass	43,964923814 ± 0,0000017 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	11,87 ± 0,05 m
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1969
parity	+

decay mode	intensitet
β⁻ (β⁻ decay)	100%

⁴⁵Ar

Numri i masës	45
numri i neutroneve	27
Relative Atomic Mass	44,968039731 ± 0,00000055 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	21,48 ± 0,15 s
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1974
parity	-

decay mode	intensitet
β⁻ (β⁻ decay)	100%

⁴⁶Ar

Numri i masës	46
numri i neutroneve	28
Relative Atomic Mass	45,968039244 ± 0,0000025 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	8,4 ± 0,6 s
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1974
parity	+

decay mode	intensitet
β⁻ (β⁻ decay)	100%

⁴⁷Ar

Numri i masës	47
numri i neutroneve	29
Relative Atomic Mass	46,972767112 ± 0,0000013 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	1,23 ± 0,03 s
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1985
parity

decay mode	intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.2%

⁴⁸Ar

Numri i masës	48
numri i neutroneve	30
Relative Atomic Mass	47,976001 ± 0,000018 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	415 ± 15 ms
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	2004
parity	+

decay mode	intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	38%

⁴⁹Ar

Numri i masës	49
numri i neutroneve	31
Relative Atomic Mass	48,981685 ± 0,000429 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	236 ± 8 ms
Spini	3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	1989
parity	-

decay mode	intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	29%
2n (2-neutron emission)

⁵⁰Ar

Numri i masës	50
numri i neutroneve	32
Relative Atomic Mass	49,985797 ± 0,000537 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life	106 ± 6 ms
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1989
parity	+

decay mode	intensitet
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	37%
2n (2-neutron emission)

⁵¹Ar

Numri i masës	51
numri i neutroneve	33
Relative Atomic Mass	50,993033 ± 0,000429 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	1/2
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	1989
parity	-

decay mode	intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵²Ar

Numri i masës	52
numri i neutroneve	34
Relative Atomic Mass	51,998519 ± 0,000644 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	2009
parity	+

decay mode	intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵³Ar

Numri i masës	53
numri i neutroneve	35
Relative Atomic Mass	53,00729 ± 0,00075 Da
g-factor
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	5/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes	2009
parity	-

decay mode	intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁵⁴Ar

Numri i masës	54
numri i neutroneve	36
Relative Atomic Mass	54,013484 ± 0,000859 Da
g-factor	0
natural abundance
Radioaktivitet	☢️ radioactive element
half-life
Spini	0
nuclear quadrupole moment	0
koha e zbulimit apo shpikjes	2018
parity	+

decay mode	intensitet
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

historia

zbulues	Sir William Ramsey, Baron Rayleigh
vendndodhja e zbulimit	Scotland
koha e zbulimit apo shpikjes	1894
Etimologjia	Greek: argos (inactive).
pronunciation	AR-gon (anglisht)

burim

Abundance
Abundance in Earth's crust	3,5 mg/kg
natural abundance (Oqeani)	0,45 mg/L
natural abundance (Trupi i njeriut)
natural abundance (meteoroid)
natural abundance (Diell)	0,007 %
Abundance in Universe	0,02 %

Nuclear Screening Constants

1	s	0.4925
2	p	3.9918
2	s	5.7696
3	p	11.2359
3	s	10.2432

Argon on ChemicalAid

Art & Architecture Thesaurus ID	300133261
Australian Educational Vocabulary ID	scot/1608
BNCF Thesaurus ID	30962
Brockhaus Enzyklopädie online ID	argon
CAB ID	42654
ChEBI ID	49475
ChemSpider ID	22407
CosIng number	54501
DSSTOX compound identifier	DTXCID0031055
DSSTox substance ID	DTXSID3052482
Den Store Danske ID	argon
ECHA Substance Infocard ID	100.028.315
Encyclopædia Universalis ID	argon
E number	E938
Freebase ID	/m/027r9df
French Vikidia ID	Argon
GND ID	4142990-4
Gran Enciclopèdia Catalana ID	0004615
Great Russian Encyclopedia Online ID	1827507
Gujarati Vishwakosh entry	આગૉર્ન
HSDB ID	7902
ICSC ID	0154
InChI	InChI=1S/Ar
InChIKey	XKRFYHLGVUSROY-UHFFFAOYSA-N
KBpedia ID	Argon
Latvian National Encyclopedia Online ID	133180
Library of Congress ID	sh85007108
MeSH descriptor ID	D001128
NDL Authority ID	00575518
National Library of Israel J9U ID	987007295519905171
National Library of Latvia ID	000328279
OmegaWiki Defined Meaning	15591
OpenAlex ID	C547737533
OpenAlex ID	C2992172976
Open Food Facts ingredient ID	propellent-gas-e938
PDB ligand ID	AR
PDB structure ID	1C6F
PDB structure ID	1C6I
PDB structure ID	1C66
PDB structure ID	1C6C
PSH ID	5818
PubChem CID	23968
Quora topic ID	Argon-element
RxNorm ID	1368133
Römpp online ID	RD-01-03226
Spanish Vikidia ID	Argón
Store norske leksikon ID	argon
Treccani Vocabulary ID	argon
U.S. National Archives Identifier	10639898
UK Archival Thesaurus ID	f2/mt225/4347/12165
UNII	67XQY1V3KH
USGS Thesaurus ID	1395
WordNet 3.1 Synset ID	14653098-n
YSO ID	14683
ZVG number	7180
identifikues i BNF	119700051
numri CAS	7440-37-1

Argon (Ar)

Tipar Fizik

Chemical Property

other

Isotopes of Argon

29Ar

30Ar

31Ar

32Ar

33Ar

34Ar

35Ar

36Ar

37Ar

38Ar

39Ar

40Ar

41Ar

42Ar

43Ar

44Ar

45Ar

46Ar

47Ar

48Ar

49Ar

50Ar

51Ar

52Ar

53Ar

54Ar

historia

burim

Nuclear Screening Constants

²⁹Ar

³⁰Ar

³¹Ar

³²Ar

³³Ar

³⁴Ar

³⁵Ar

³⁶Ar

³⁷Ar

³⁸Ar

³⁹Ar

⁴⁰Ar

⁴¹Ar

⁴²Ar

⁴³Ar

⁴⁴Ar

⁴⁵Ar

⁴⁶Ar

⁴⁷Ar

⁴⁸Ar

⁴⁹Ar

⁵⁰Ar

⁵¹Ar

⁵²Ar

⁵³Ar

⁵⁴Ar