Argons (Ar)

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

Atomic Number	18
Atomic Weight	39.948
Masas skaitlis	40

Group	18
Period	3
Block	p

protons	18 p⁺
neitrons	22 n⁰
elektrons	18 e^-

Animated Bora atoma struktūras modelis of Ar (Argons)

Fizikāla Īpašība

Atoma Rādiuss	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
blīvums	0,001633 g/cm³

Chemical Property

enerģija

proton affinity	369,2 kJ/mol
Elektrontieksme	-11,5 eV/particle
jonizācijas potenciāls	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
elektrons

electron shell	2, 8, 8

vērtības elektrons	8 ⓘ

elektronu konfigurācija	[Ne] 3s² 3p⁶ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶

Oksidēšanas pakāpe	0
elektronegativitāte	19,17 eV/particle 0.2922
Electrophilicity Index	0,0832013314590371 eV/particle
fundamentālais agregātstāvoklis

agregātstāvoklis	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
trīskāršais punkts	83,8058 K 68,89 kPa
appearance
krāsa	Colorless #ff1493 #80d1e3 #80d1e3
appearance	colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Laušanas koeficients	1,000281
thermodynamic material property
Thermal Conductivity	0,0177 W/(m K)
Termiskā izplešanās
Molārā siltumietilpība	20,786 J/(mol K)
Specific Heat Capacity	0,52 J/(g⋅K)
heat capacity ratio	5/3
electrical properties
type
electrical conductivity
īpatnējā pretestība
Supravadītspēja
Magnētisms
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
struktūra
Crystal Structure	Face Centered Cubic (FCC)
lattice constant	5,26 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
Cietība
tilpuma elastības modulis
shear modulus
Junga modulis
Poisson's ratio
skaņas ātrums	319 m/s
klasifikācija
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
quantum number	1S0
space group	225 (Fm_3m)

Isotopes of Argon

Stable Isotopes	2
Unstable Isotopes	24
Natural Isotopes	3

²⁹Ar

Masas skaitlis	29
neutron number	11
Relative Atomic Mass	29,040761 ± 0,000471 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods
spins	5/2
nuclear quadrupole moment
atklāšanas datums	2018
parity	+

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

³⁰Ar

Masas skaitlis	30
neutron number	12
Relative Atomic Mass	30,023694 ± 0,000192 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods
spins	0
nuclear quadrupole moment	0
atklāšanas datums	2015
parity	+

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

³¹Ar

Masas skaitlis	31
neutron number	13
Relative Atomic Mass	31,012158 ± 0,000215 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	15 ± 0,3 ms
spins	5/2
nuclear quadrupole moment
atklāšanas datums	1986
parity	+

decay mode	intensity
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

Masas skaitlis	32
neutron number	14
Relative Atomic Mass	31,997637824 ± 0,0000019 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	98 ± 2 ms
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1977
parity	+

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

³³Ar

Masas skaitlis	33
neutron number	15
Relative Atomic Mass	32,989925545 ± 0,00000043 Da
g-factor	-1,446 ± 0,012
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	173 ± 2 ms
spins	1/2
nuclear quadrupole moment	0
atklāšanas datums	1964
parity	+

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

³⁴Ar

Masas skaitlis	34
neutron number	16
Relative Atomic Mass	33,980270092 ± 0,000000083 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	846,46 ± 0,35 ms
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1966
parity	+

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

³⁵Ar

Masas skaitlis	35
neutron number	17
Relative Atomic Mass	34,975257719 ± 0,00000073 Da
g-factor	0,42133333333333 ± 0,00013333333333333
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	1,7756 ± 0,001 s
spins	3/2
nuclear quadrupole moment	-0,084 ± 0,015
atklāšanas datums	1940
parity	+

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

³⁶Ar

Masas skaitlis	36
neutron number	18
Relative Atomic Mass	35,967545106 ± 0,000000028 Da
g-factor	0
natural abundance	0,3336 ± 0,021
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1920
parity	+

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

³⁷Ar

Masas skaitlis	37
neutron number	19
Relative Atomic Mass	36,966776301 ± 0,000000221 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	35,011 ± 0,019 d
spins	3/2
nuclear quadrupole moment	0,076 ± 0,003
atklāšanas datums	1941
parity	+

decay mode	intensity
ϵ (electron capture)	100%

³⁸Ar

Masas skaitlis	38
neutron number	20
Relative Atomic Mass	37,962732102 ± 0,000000209 Da
g-factor	0
natural abundance	0,0629 ± 0,007
radioaktivitāte	stable isotope
Pussabrukšanas periods	Not Radioactive ☢️
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1934
parity	+

³⁹Ar

Masas skaitlis	39
neutron number	21
Relative Atomic Mass	38,964313037 ± 0,000005367 Da
g-factor	-0,45428571428571 ± 0,0042857142857143
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	268 ± 8 y
spins	7/2
nuclear quadrupole moment	-0,116 ± 0,002
atklāšanas datums	1950
parity	-

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

⁴⁰Ar

Masas skaitlis	40
neutron number	22
Relative Atomic Mass	39,96238312204 ± 0,00000000234 Da
g-factor	0
natural abundance	99,6035 ± 0,025
radioaktivitāte	stable isotope
Pussabrukšanas periods	Not Radioactive ☢️
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1920
parity	+

⁴¹Ar

Masas skaitlis	41
neutron number	23
Relative Atomic Mass	40,96450057 ± 0,000000372 Da
g-factor	-0,37428571428571 ± 0,0022857142857143
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	109,61 ± 0,04 m
spins	7/2
nuclear quadrupole moment	-0,042 ± 0,004
atklāšanas datums	1936
parity	-

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

⁴²Ar

Masas skaitlis	42
neutron number	24
Relative Atomic Mass	41,963045737 ± 0,0000062 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	32,9 ± 1,1 y
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1952
parity	+

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

⁴³Ar

Masas skaitlis	43
neutron number	25
Relative Atomic Mass	42,965636056 ± 0,0000057 Da
g-factor	-0,4088 ± 0,0024
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	5,37 ± 0,06 m
spins	5/2
nuclear quadrupole moment	0,142 ± 0,014
atklāšanas datums	1969
parity

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

⁴⁴Ar

Masas skaitlis	44
neutron number	26
Relative Atomic Mass	43,964923814 ± 0,0000017 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	11,87 ± 0,05 m
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1969
parity	+

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

⁴⁵Ar

Masas skaitlis	45
neutron number	27
Relative Atomic Mass	44,968039731 ± 0,00000055 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	21,48 ± 0,15 s
spins	5/2
nuclear quadrupole moment
atklāšanas datums	1974
parity	-

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

⁴⁶Ar

Masas skaitlis	46
neutron number	28
Relative Atomic Mass	45,968039244 ± 0,0000025 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	8,4 ± 0,6 s
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1974
parity	+

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

⁴⁷Ar

Masas skaitlis	47
neutron number	29
Relative Atomic Mass	46,972767112 ± 0,0000013 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	1,23 ± 0,03 s
spins	3/2
nuclear quadrupole moment
atklāšanas datums	1985
parity

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

⁴⁸Ar

Masas skaitlis	48
neutron number	30
Relative Atomic Mass	47,976001 ± 0,000018 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	415 ± 15 ms
spins	0
nuclear quadrupole moment	0
atklāšanas datums	2004
parity	+

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

⁴⁹Ar

Masas skaitlis	49
neutron number	31
Relative Atomic Mass	48,981685 ± 0,000429 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	236 ± 8 ms
spins	3/2
nuclear quadrupole moment
atklāšanas datums	1989
parity	-

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

⁵⁰Ar

Masas skaitlis	50
neutron number	32
Relative Atomic Mass	49,985797 ± 0,000537 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods	106 ± 6 ms
spins	0
nuclear quadrupole moment	0
atklāšanas datums	1989
parity	+

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

⁵¹Ar

Masas skaitlis	51
neutron number	33
Relative Atomic Mass	50,993033 ± 0,000429 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods
spins	1/2
nuclear quadrupole moment	0
atklāšanas datums	1989
parity	-

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

⁵²Ar

Masas skaitlis	52
neutron number	34
Relative Atomic Mass	51,998519 ± 0,000644 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods
spins	0
nuclear quadrupole moment	0
atklāšanas datums	2009
parity	+

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

⁵³Ar

Masas skaitlis	53
neutron number	35
Relative Atomic Mass	53,00729 ± 0,00075 Da
g-factor
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods
spins	5/2
nuclear quadrupole moment
atklāšanas datums	2009
parity	-

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

⁵⁴Ar

Masas skaitlis	54
neutron number	36
Relative Atomic Mass	54,013484 ± 0,000859 Da
g-factor	0
natural abundance
radioaktivitāte	☢️ radioactive element
Pussabrukšanas periods
spins	0
nuclear quadrupole moment	0
atklāšanas datums	2018
parity	+

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

vēsture

atklājējs vai izgudrotājs	Sir William Ramsey, Baron Rayleigh
atraduma atrašanās vieta	Scotland
atklāšanas datums	1894
Etimoloģija	Greek: argos (inactive).
izruna	AR-gon (angļu)

avots

Abundance
Abundance in Earth's crust	3,5 mg/kg
natural abundance (okeāns)	0,45 mg/L
natural abundance (cilvēka ķermenis)
natural abundance (meteoroīds)
natural abundance (Saule)	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

Argons on ChemicalAid

AAT ID	300133261
Austrālijas Izglītības vārdnīcas identifikators	scot/1608
BNCF	30962
BNF kods	119700051
Brockhaus Enzyklopädie online ID	argon
CAB ID	42654
CAS reģistrācijas numurs	7440-37-1
ChEBI ID	49475
ChemSpider ID	22407
CosIng number	54501
DSSTOX compound identifier	DTXCID0031055
DSSTox identifikators	DTXSID3052482
Den Store Danske ID	argon
ECHA Substance Infocard ID	100.028.315
Encyclopædia Universalis ID	argon
E numurs	E938
Freebase identifikators	/m/027r9df
French Vikidia ID	Argon
GND identifikators	4142990-4
Gujarati Vishwakosh entry	આગૉર્ન
HSDB ID	7902
ICSC ID	0154
InChI	InChI=1S/Ar
InChIKey	XKRFYHLGVUSROY-UHFFFAOYSA-N
KBpedia ID	Argon
Katalāņu Lielās enciklopēdijas kods	0004615
Krievijas Lielās enciklopēdijas tiešsaistes kods	1827507
LCCN identifikators	sh85007108
LNB identifikators	000328279
Latvijas Nacionālās enciklopēdijas tiešsaistes ID	133180
MeSH ID	D001128
NDL identifikators	00575518
National Library of Israel J9U ID	987007295519905171
OmegaWiki definētā nozīme	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 ID (CID)	23968
Quora temata 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

Argons (Ar)

Fizikāla Īpašība

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

vēsture

avots

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