Argon (Ar)

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

Atomic Number	18
Atomic Weight	39.948
Nombor jisim	40

Group	18
Period	3
Block	p

proton	18 p⁺
neutron	22 n⁰
Elektron	18 e^-

Sifat Fizikal

Jejari Atom	71 pm 197 pm
molar volume	24.2 cm³/mol
Jejari kovalen	96 pm 107 pm 96 pm 106 pm
Metallic Radius
ionic radius
Crystal Radius
Jejari van der Waals	188 pm 188 pm 199 pm 386.8 pm
ketumpatan	0.001633 g/cm³

Sifat Kimia

tenaga

proton affinity	369.2 kJ/mol
Pertalian elektron	-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

Entalpi pengewapan	6.52 kJ/mol
entalpi pelakuran
standard enthalpy of formation
Elektron

Petala elektron	2, 8, 8

Elektron valens	8 ⓘ

tatarajah elektron	[Ne] 3s² 3p⁶ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶

Keadaan pengoksidaan	0
Keelektronegatifan	19.17 eV/particle 0.2922
Electrophilicity Index	0.0832013314590371 eV/particle
keadaan jirim asas

fasa jirim	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
rupa
warna	Colorless #ff1493 #80d1e3 #80d1e3
rupa	colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
indeks biasan	1.000281
sifat bahan
Thermal Conductivity	0.0177 W/(m K)
Pengembangan terma
molar heat capacity	20.786 J/(mol K)
Specific Heat Capacity	0.52 J/(g⋅K)
heat capacity ratio	5/3
electrical properties
type
Kekonduksian elektrik
Kerintangan dan kekonduksian elektrik
Kesuperkonduksian
kemagnetan
type	diamagnetic
magnetic susceptibility (Mass)	-0.000000006 m³/Kg
magnetic susceptibility (Molar)	-0.00000000024 m³/mol
magnetic susceptibility (Volume)	-0.0000000107
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	Face Centered Cubic (FCC)
lattice constant	5.26 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness
Modulus pukal
shear modulus
Young's modulus
Nisbah Poisson
Kelajuan bunyi	319 m/s
pengelasan
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
Nombor kuantum	1S0
space group	225 (Fm_3m)

Isotopes of Argon

Stable Isotopes	2
Unstable Isotopes	24
Natural Isotopes	3

²⁹Ar

Nombor jisim	29
nombor neutron	11
jisim atom relatif	29.040761 ± 0.000471 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	2018
parity	+

decay mode	Keamatan (fizik)
2p (2-proton emission)	100%

³⁰Ar

Nombor jisim	30
nombor neutron	12
jisim atom relatif	30.023694 ± 0.000192 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	2015
parity	+

decay mode	Keamatan (fizik)
2p (2-proton emission)	100%

³¹Ar

Nombor jisim	31
nombor neutron	13
jisim atom relatif	31.012158 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	15 ± 0.3 ms
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1986
parity	+

decay mode	Keamatan (fizik)
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

Nombor jisim	32
nombor neutron	14
jisim atom relatif	31.997637824 ± 0.0000019 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	98 ± 2 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1977
parity	+

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

³³Ar

Nombor jisim	33
nombor neutron	15
jisim atom relatif	32.989925545 ± 0.00000043 Da
g-factor	-1.446 ± 0.012
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	173 ± 2 ms
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1964
parity	+

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

³⁴Ar

Nombor jisim	34
nombor neutron	16
jisim atom relatif	33.980270092 ± 0.000000083 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	846.46 ± 0.35 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1966
parity	+

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

³⁵Ar

Nombor jisim	35
nombor neutron	17
jisim atom relatif	34.975257719 ± 0.00000073 Da
g-factor	0.42133333333333 ± 0.00013333333333333
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.7756 ± 0.001 s
Spin	3/2
nuclear quadrupole moment	-0.084 ± 0.015
tarikh penemuan	1940
parity	+

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

³⁶Ar

Nombor jisim	36
nombor neutron	18
jisim atom relatif	35.967545106 ± 0.000000028 Da
g-factor	0
natural abundance	0.3336 ± 0.021
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1920
parity	+

decay mode	Keamatan (fizik)
2β⁺ (double β⁺ decay)

³⁷Ar

Nombor jisim	37
nombor neutron	19
jisim atom relatif	36.966776301 ± 0.000000221 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	35.011 ± 0.019 d
Spin	3/2
nuclear quadrupole moment	0.076 ± 0.003
tarikh penemuan	1941
parity	+

decay mode	Keamatan (fizik)
ϵ (electron capture)	100%

³⁸Ar

Nombor jisim	38
nombor neutron	20
jisim atom relatif	37.962732102 ± 0.000000209 Da
g-factor	0
natural abundance	0.0629 ± 0.007
Reputan radioaktif	Isotop stabil
setengah hayat	Not Radioactive ☢️
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1934
parity	+

³⁹Ar

Nombor jisim	39
nombor neutron	21
jisim atom relatif	38.964313037 ± 0.000005367 Da
g-factor	-0.45428571428571 ± 0.0042857142857143
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	268 ± 8 y
Spin	7/2
nuclear quadrupole moment	-0.116 ± 0.002
tarikh penemuan	1950
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁴⁰Ar

Nombor jisim	40
nombor neutron	22
jisim atom relatif	39.96238312204 ± 0.00000000234 Da
g-factor	0
natural abundance	99.6035 ± 0.025
Reputan radioaktif	Isotop stabil
setengah hayat	Not Radioactive ☢️
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1920
parity	+

⁴¹Ar

Nombor jisim	41
nombor neutron	23
jisim atom relatif	40.96450057 ± 0.000000372 Da
g-factor	-0.37428571428571 ± 0.0022857142857143
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	109.61 ± 0.04 m
Spin	7/2
nuclear quadrupole moment	-0.042 ± 0.004
tarikh penemuan	1936
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁴²Ar

Nombor jisim	42
nombor neutron	24
jisim atom relatif	41.963045737 ± 0.0000062 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	32.9 ± 1.1 y
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1952
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁴³Ar

Nombor jisim	43
nombor neutron	25
jisim atom relatif	42.965636056 ± 0.0000057 Da
g-factor	-0.4088 ± 0.0024
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5.37 ± 0.06 m
Spin	5/2
nuclear quadrupole moment	0.142 ± 0.014
tarikh penemuan	1969
parity

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁴⁴Ar

Nombor jisim	44
nombor neutron	26
jisim atom relatif	43.964923814 ± 0.0000017 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	11.87 ± 0.05 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1969
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁴⁵Ar

Nombor jisim	45
nombor neutron	27
jisim atom relatif	44.968039731 ± 0.00000055 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	21.48 ± 0.15 s
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1974
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁴⁶Ar

Nombor jisim	46
nombor neutron	28
jisim atom relatif	45.968039244 ± 0.0000025 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	8.4 ± 0.6 s
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1974
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁴⁷Ar

Nombor jisim	47
nombor neutron	29
jisim atom relatif	46.972767112 ± 0.0000013 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.23 ± 0.03 s
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1985
parity

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

⁴⁸Ar

Nombor jisim	48
nombor neutron	30
jisim atom relatif	47.976001 ± 0.000018 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	415 ± 15 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	2004
parity	+

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

⁴⁹Ar

Nombor jisim	49
nombor neutron	31
jisim atom relatif	48.981685 ± 0.000429 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	236 ± 8 ms
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1989
parity	-

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

⁵⁰Ar

Nombor jisim	50
nombor neutron	32
jisim atom relatif	49.985797 ± 0.000537 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	106 ± 6 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1989
parity	+

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

⁵¹Ar

Nombor jisim	51
nombor neutron	33
jisim atom relatif	50.993033 ± 0.000429 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1989
parity	-

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

⁵²Ar

Nombor jisim	52
nombor neutron	34
jisim atom relatif	51.998519 ± 0.000644 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	2009
parity	+

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

⁵³Ar

Nombor jisim	53
nombor neutron	35
jisim atom relatif	53.00729 ± 0.00075 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	2009
parity	-

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

⁵⁴Ar

Nombor jisim	54
nombor neutron	36
jisim atom relatif	54.013484 ± 0.000859 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	2018
parity	+

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

sejarah

penemu atau pereka	Sir William Ramsey, Baron Rayleigh
tempat penemuan	Scotland
tarikh penemuan	1894
Etimologi	Greek: argos (inactive).
sebutan	AR-gon (Inggeris)

sumber

Abundance
Abundance in Earth's crust	3.5 mg/kg
natural abundance (lautan)	0.45 mg/L
natural abundance (Tubuh manusia)
natural abundance (Meteoroid)
natural abundance (Matahari)	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

ChEBI ID	49475
ChemSpider ID	22407
CosIng number	54501
DSSTOX compound identifier	DTXCID0031055
ECHA Substance Infocard ID	100.028.315
Gujarati Vishwakosh entry	આગૉર્ન
HSDB ID	7902
ICSC ID	0154
ID BnF	119700051
ID CAB	42654
ID Den Store Danske	argon
ID Encyclopædia Universalis	argon
ID Ensiklopedia Besar Rusia dalam talian	1827507
ID Freebase	/m/027r9df
ID GND	4142990-4
ID Gran Enciclopèdia Catalana	0004615
ID J9U Perpustakaan Negara Israel	987007295519905171
ID KBpedia	Argon
ID PSH	5818
ID Perbendaharaan Kata Pendidikan Australia	scot/1608
ID Store norske leksikon	argon
ID Tesaurus BNCF	30962
ID Vikidia Perancis	Argon
ID WordNet 3.1 Synset	14653098-n
ID YSO	14683
ID bahan DSSTox	DTXSID3052482
ID dalam talian Brockhaus Enzyklopädie	argon
ID kewibawaan Perpustakaan Kongres	sh85007108
ID pemerihal MeSH	D001128
ID topik Quora	Argon-element
InChI	InChI=1S/Ar
InChIKey	XKRFYHLGVUSROY-UHFFFAOYSA-N
Latvian National Encyclopedia Online ID	133180
Maksud Tertakrif OmegaWiki	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
Pengenal Pasti Arkib Negara A.S.	10639898
PubChem CID	23968
RxNorm ID	1368133
Römpp online ID	RD-01-03226
Spanish Vikidia ID	Argón
Treccani Vocabulary ID	argon
UK Archival Thesaurus ID	f2/mt225/4347/12165
UNII	67XQY1V3KH
USGS Thesaurus ID	1395
ZVG number	7180
nombor E	E938
nombor pendaftaran CAS	7440-37-1
pengecam AAT	300133261
pengecam LNB	000328279
pengecam NDL	00575518

Argon (Ar)

Sifat Fizikal

Sifat Kimia

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

sejarah

sumber

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