Argon (Ar)

hemijski element sa simbolom Ar i atomskim brojem 18

Atomic Number	18
Atomic Weight	39.948
Maseni broj	40

Group	18
Period	3
Block	p

Proton	18 p⁺
Neutron	22 n⁰
Elektron	18 e^-

Animated Bohrov model atoma of Ar (Argon)

Physical Property

Atomski Radijus	71 pm 197 pm
Molarni volumen	24,2 cm³/mol
covalent radius	96 pm 107 pm 96 pm 106 pm
Metallic Radius
Ionski radijus
Crystal Radius
Van der Waalsov radijus	188 pm 188 pm 199 pm 386,8 pm
gustoća	0,001633 g/cm³

Chemical Property

energija

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

Toplota isparavanja	6,52 kJ/mol
toplota topljenja
standard enthalpy of formation
Elektron

electron shell	2, 8, 8

Valentni elektron	8 ⓘ

electron configuration	[Ne] 3s² 3p⁶ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶

oksidacijsko stanje	0
Elektronegativnost	19,17 eV/particle 0.2922
Electrophilicity Index	0,0832013314590371 eV/particle
fundamental state of matter

agregatno stanje	Gas
gaseous state of matter	Monoatomic
Boiling Point	87,302 K
Melting Point	83,81 K
critical pressure	4,863 MPa
Kritična temperatura	150,687 K
Trojna tačka	83,8058 K 68,89 kPa
appearance
boja	Colorless #ff1493 #80d1e3 #80d1e3
appearance	colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Indeks prelamanja	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
Specifična električna provodljivost
electrical resistivity
Superprovodljivost
Magnetizam
type	diamagnetic
magnetic susceptibility (Mass)	-0,000000006 m³/Kg
magnetic susceptibility (Molar)	-0,00000000024 m³/mol
magnetic susceptibility (Volume)	-0,0000000107
magnetic ordering
Kirijeva tačka
Néel temperature
struktura
Crystal Structure	Face Centered Cubic (FCC)
lattice constant	5,26 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Brzina zvuka	319 m/s
klasifikacija
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
Kvantni brojevi	1S0
space group	225 (Fm_3m)

Isotopes of Argon

Stable Isotopes	2
Unstable Isotopes	24
Natural Isotopes	3

²⁹Ar

Maseni broj	29
broj neutrona	11
Relative Atomic Mass	29,040761 ± 0,000471 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	5/2
nuclear quadrupole moment
datum otkrića	2018
parity	+

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

³⁰Ar

Maseni broj	30
broj neutrona	12
Relative Atomic Mass	30,023694 ± 0,000192 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
datum otkrića	2015
parity	+

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

³¹Ar

Maseni broj	31
broj neutrona	13
Relative Atomic Mass	31,012158 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	15 ± 0,3 ms
spin	5/2
nuclear quadrupole moment
datum otkrića	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

Maseni broj	32
broj neutrona	14
Relative Atomic Mass	31,997637824 ± 0,0000019 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	98 ± 2 ms
spin	0
nuclear quadrupole moment	0
datum otkrića	1977
parity	+

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

³³Ar

Maseni broj	33
broj neutrona	15
Relative Atomic Mass	32,989925545 ± 0,00000043 Da
g-factor	-1,446 ± 0,012
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	173 ± 2 ms
spin	1/2
nuclear quadrupole moment	0
datum otkrića	1964
parity	+

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

³⁴Ar

Maseni broj	34
broj neutrona	16
Relative Atomic Mass	33,980270092 ± 0,000000083 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	846,46 ± 0,35 ms
spin	0
nuclear quadrupole moment	0
datum otkrića	1966
parity	+

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

³⁵Ar

Maseni broj	35
broj neutrona	17
Relative Atomic Mass	34,975257719 ± 0,00000073 Da
g-factor	0,42133333333333 ± 0,00013333333333333
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,7756 ± 0,001 s
spin	3/2
nuclear quadrupole moment	-0,084 ± 0,015
datum otkrića	1940
parity	+

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

³⁶Ar

Maseni broj	36
broj neutrona	18
Relative Atomic Mass	35,967545106 ± 0,000000028 Da
g-factor	0
natural abundance	0,3336 ± 0,021
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
datum otkrića	1920
parity	+

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

³⁷Ar

Maseni broj	37
broj neutrona	19
Relative Atomic Mass	36,966776301 ± 0,000000221 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	35,011 ± 0,019 d
spin	3/2
nuclear quadrupole moment	0,076 ± 0,003
datum otkrića	1941
parity	+

decay mode	intensity
ϵ (electron capture)	100%

³⁸Ar

Maseni broj	38
broj neutrona	20
Relative Atomic Mass	37,962732102 ± 0,000000209 Da
g-factor	0
natural abundance	0,0629 ± 0,007
Radioaktivnost	stable isotope
Vrijeme poluraspada	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
datum otkrića	1934
parity	+

³⁹Ar

Maseni broj	39
broj neutrona	21
Relative Atomic Mass	38,964313037 ± 0,000005367 Da
g-factor	-0,45428571428571 ± 0,0042857142857143
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	268 ± 8 y
spin	7/2
nuclear quadrupole moment	-0,116 ± 0,002
datum otkrića	1950
parity	-

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

⁴⁰Ar

Maseni broj	40
broj neutrona	22
Relative Atomic Mass	39,96238312204 ± 0,00000000234 Da
g-factor	0
natural abundance	99,6035 ± 0,025
Radioaktivnost	stable isotope
Vrijeme poluraspada	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
datum otkrića	1920
parity	+

⁴¹Ar

Maseni broj	41
broj neutrona	23
Relative Atomic Mass	40,96450057 ± 0,000000372 Da
g-factor	-0,37428571428571 ± 0,0022857142857143
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	109,61 ± 0,04 m
spin	7/2
nuclear quadrupole moment	-0,042 ± 0,004
datum otkrića	1936
parity	-

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

⁴²Ar

Maseni broj	42
broj neutrona	24
Relative Atomic Mass	41,963045737 ± 0,0000062 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	32,9 ± 1,1 y
spin	0
nuclear quadrupole moment	0
datum otkrića	1952
parity	+

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

⁴³Ar

Maseni broj	43
broj neutrona	25
Relative Atomic Mass	42,965636056 ± 0,0000057 Da
g-factor	-0,4088 ± 0,0024
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	5,37 ± 0,06 m
spin	5/2
nuclear quadrupole moment	0,142 ± 0,014
datum otkrića	1969
parity

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

⁴⁴Ar

Maseni broj	44
broj neutrona	26
Relative Atomic Mass	43,964923814 ± 0,0000017 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	11,87 ± 0,05 m
spin	0
nuclear quadrupole moment	0
datum otkrića	1969
parity	+

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

⁴⁵Ar

Maseni broj	45
broj neutrona	27
Relative Atomic Mass	44,968039731 ± 0,00000055 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	21,48 ± 0,15 s
spin	5/2
nuclear quadrupole moment
datum otkrića	1974
parity	-

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

⁴⁶Ar

Maseni broj	46
broj neutrona	28
Relative Atomic Mass	45,968039244 ± 0,0000025 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	8,4 ± 0,6 s
spin	0
nuclear quadrupole moment	0
datum otkrića	1974
parity	+

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

⁴⁷Ar

Maseni broj	47
broj neutrona	29
Relative Atomic Mass	46,972767112 ± 0,0000013 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	1,23 ± 0,03 s
spin	3/2
nuclear quadrupole moment
datum otkrića	1985
parity

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

⁴⁸Ar

Maseni broj	48
broj neutrona	30
Relative Atomic Mass	47,976001 ± 0,000018 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	415 ± 15 ms
spin	0
nuclear quadrupole moment	0
datum otkrića	2004
parity	+

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

⁴⁹Ar

Maseni broj	49
broj neutrona	31
Relative Atomic Mass	48,981685 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	236 ± 8 ms
spin	3/2
nuclear quadrupole moment
datum otkrića	1989
parity	-

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

⁵⁰Ar

Maseni broj	50
broj neutrona	32
Relative Atomic Mass	49,985797 ± 0,000537 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	106 ± 6 ms
spin	0
nuclear quadrupole moment	0
datum otkrića	1989
parity	+

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

⁵¹Ar

Maseni broj	51
broj neutrona	33
Relative Atomic Mass	50,993033 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	1/2
nuclear quadrupole moment	0
datum otkrića	1989
parity	-

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

⁵²Ar

Maseni broj	52
broj neutrona	34
Relative Atomic Mass	51,998519 ± 0,000644 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
datum otkrića	2009
parity	+

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

⁵³Ar

Maseni broj	53
broj neutrona	35
Relative Atomic Mass	53,00729 ± 0,00075 Da
g-factor
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	5/2
nuclear quadrupole moment
datum otkrića	2009
parity	-

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

⁵⁴Ar

Maseni broj	54
broj neutrona	36
Relative Atomic Mass	54,013484 ± 0,000859 Da
g-factor	0
natural abundance
Radioaktivnost	☢️ radioactive element
Vrijeme poluraspada
spin	0
nuclear quadrupole moment	0
datum otkrića	2018
parity	+

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

historija

otkrivač ili izumitelj	Sir William Ramsey, Baron Rayleigh
mjesto otkrića	Scotland
datum otkrića	1894
Etimologija	Greek: argos (inactive).
pronunciation	AR-gon (engleski)

izvor

Abundance
Abundance in Earth's crust	3,5 mg/kg
natural abundance (okean)	0,45 mg/L
natural abundance (ljudsko tijelo)
natural abundance (Meteoroidi)
natural abundance (Sunce)	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

AAT identifikator	300133261
Australian Educational Vocabulary ID	scot/1608
BNCF pojmovnik	30962
BNF kod	119700051
Brockhaus Enzyklopädie online ID	argon
CAB ID	42654
CAS broj	7440-37-1
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
E broj	E938
Encyclopædia Universalis ID	argon
French Vikidia ID	Argon
GND	4142990-4
Gran Enciclopèdia Catalana ID	0004615
Great Russian Encyclopedia Online ID	1827507
Gujarati Vishwakosh entry	આગૉર્ન
HSDB ID	7902
ICSC ID	0154
ID Quora teme	Argon-element
ID na KBpediji	Argon
InChIKey	XKRFYHLGVUSROY-UHFFFAOYSA-N
InChl	InChI=1S/Ar
LCCN	sh85007108
Latvian National Encyclopedia Online ID	133180
MeSH ID	D001128
National Library of Israel J9U ID	987007295519905171
National Library of Latvia ID	000328279
OmegaWiki određeno značenje	15591
OpenAlex ID	C547737533
OpenAlex ID	C2992172976
Open Food Facts ingredient ID	propellent-gas-e938
PDB ID	1C6F
PDB ID	1C6I
PDB ID	1C66
PDB ID	1C6C
PDB ligand ID	AR
PSH ID	5818
PubChem ID (CID)	23968
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
Web NDL autoriteti	00575518
WordNet 3.1 Synset ID	14653098-n
YSO ID	14683
ZVG broj	7180
broj na Freebaseu	/m/027r9df

Argon (Ar)

Physical Property

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

historija

izvor

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