Argon

Argon (Ar)

grundstof med atomnummer 18
Atomnummer18
Atommasse39.948
mass number40
Gruppe18
Periode3
Blokp
proton18 p+
neutron22 n0
elektron18 e-
Animated Bohrs atommodel of Ar (Argon)

Fysisk Egenskab

Atomradius
71 pm
molar volume
24,2 cm³/mol
Kovalent Radius
96 pm
Metallic Radius
Ionisk radius
Crystal Radius
Van der Waals-radius
188 pm
massefylde
0,001633 g/cm³
Atomic Radii Of The Elements: Argon0102030405060708090100110120130140150160170180190pmAtomradiusKovalent RadiusMetallic RadiusVan der Waals-radius

Kemisk Egenskab

{ERROR}
energi
proton affinity
369,2 kJ/mol
electron affinity
-11,5 eV/particle
ioniseringsenergi
15,7596112 eV/particle
ioniseringsenergi of Ar (Argon)
Fordampningsvarme
6,52 kJ/mol
smeltevarme
standard enthalpy of formation
elektron
Elektronskal2, 8, 8
Bohrs atommodel: Ar (Argon)
Valenselektron8 ⓘ
Elektronprikmodellen: Ar (Argon)
electron configuration[Ne] 3s2 3p6ⓘ
1s2 2s2 2p6 3s2 3p6
Enhanced Bohrs atommodel of Ar (Argon)
Orbital Diagram of Ar (Argon)
Oxidationstrin0
Elektronegativitet
Electrophilicity Index
0,0832013314590371 eV/particle
fundamental state of matter
stoffase
gaseous state of matterMonoatomic
Kogepunkt
87,302 K
Smeltepunkt
83,81 K
critical pressure
4,863 MPa
critical temperature
150,687 K
trippelpunkt
83,8058 K
68,89 kPa
appearance
farve
Sort
appearancecolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Brydningsindeks
1,000281
materialeegenskab
Varmeledningsevne
0,0177 W/(m K)
Termisk ekspansion
molar heat capacity
20,786 J/(mol K)
Varmefylde
0,52 J/(g⋅K)
Adiabateksponenten5/3
electrical properties
type
specifik ledningsevne
Elektrisk resistivitet
superledning
Magnetisme
typediamagnetic
magnetic susceptibility (Mass)
-0,000000006 m³/Kg
magnetic susceptibility (Molar)
-0,00000000024 m³/mol
magnetic susceptibility (Volume)
-0,0000000107
magnetic ordering
Curietemperaturen
Néel temperature
struktur
Krystalstruktur{ERROR}
lattice constant
5,26 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hårdhed
Kompressibilitetsmodul
Forskydningsmodul
E-modul
Poissons forhold
speed of sound
319 m/s
klassificering
KategoriActinider, Noble gases
CAS GroupVIII
IUPAC GroupVIIIA
Glawe Number3
Mendeleev Number114
Pettifor Number3
Geochemical Classvolatile
Goldschmidt classificationatmophile

øvrige

Gas Basicity
346,3 kJ/mol
polarizability
11,083 ± 0,007 a₀
C6 Dispersion Coefficient
64,2 a₀
allotrope
Neutron cross section
0,66
Neutron Mass Absorption
0,00059
quantum number1S0
rumgruppe225 (Fm_3m)

Isotopes of Argon

Stable Isotopes2
Unstable Isotopes24
Natural Isotopes3
Isotopic Composition4099.60%4099.60%360.33%360.33%380.06%380.06%

29Ar

mass number29
neutron number11
Relative Atomic Mass
29,040761 ± 0,000471 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
spin5/2
nuclear quadrupole moment
opdagelsesdato2018
Paritet+
decay modeIntensitet
2p (2-proton emission)100%

30Ar

mass number30
neutron number12
Relative Atomic Mass
30,023694 ± 0,000192 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
spin0
nuclear quadrupole moment
0
opdagelsesdato2015
Paritet+
decay modeIntensitet
2p (2-proton emission)100%

31Ar

mass number31
neutron number13
Relative Atomic Mass
31,012158 ± 0,000215 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
15 ± 0,3 ms
spin5/2
nuclear quadrupole moment
opdagelsesdato1986
Paritet+
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)68.3%
2p (2-proton emission)9%
B+pA0.38%
3p0.07%
β+α (β+-delayed α emission)0.03%
2p (2-proton emission)0.0006%

32Ar

mass number32
neutron number14
Relative Atomic Mass
31,997637824 ± 0,0000019 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
98 ± 2 ms
spin0
nuclear quadrupole moment
0
opdagelsesdato1977
Paritet+
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)35.58%

33Ar

mass number33
neutron number15
Relative Atomic Mass
32,989925545 ± 0,00000043 Da
g-factor
-1,446 ± 0,012
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
173 ± 2 ms
spin1/2
nuclear quadrupole moment
0
opdagelsesdato1964
Paritet+
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)38.7%

34Ar

mass number34
neutron number16
Relative Atomic Mass
33,980270092 ± 0,000000083 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
846,46 ± 0,35 ms
spin0
nuclear quadrupole moment
0
opdagelsesdato1966
Paritet+
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

35Ar

mass number35
neutron number17
Relative Atomic Mass
34,975257719 ± 0,00000073 Da
g-factor
0,42133333333333 ± 0,00013333333333333
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
1,7756 ± 0,001 s
spin3/2
nuclear quadrupole moment
-0,084 ± 0,015
opdagelsesdato1940
Paritet+
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

36Ar

mass number36
neutron number18
Relative Atomic Mass
35,967545106 ± 0,000000028 Da
g-factor
0
natural abundance
0,3336 ± 0,021
radioaktivitet☢️ radioactive element
halveringstid
spin0
nuclear quadrupole moment
0
opdagelsesdato1920
Paritet+
decay modeIntensitet
2β+ (double β+ decay)

37Ar

mass number37
neutron number19
Relative Atomic Mass
36,966776301 ± 0,000000221 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
35,011 ± 0,019 d
spin3/2
nuclear quadrupole moment
0,076 ± 0,003
opdagelsesdato1941
Paritet+
decay modeIntensitet
ϵ (electron capture)100%

38Ar

mass number38
neutron number20
Relative Atomic Mass
37,962732102 ± 0,000000209 Da
g-factor
0
natural abundance
0,0629 ± 0,007
radioaktivitetstable isotope
halveringstidNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
opdagelsesdato1934
Paritet+

39Ar

mass number39
neutron number21
Relative Atomic Mass
38,964313037 ± 0,000005367 Da
g-factor
-0,45428571428571 ± 0,0042857142857143
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
268 ± 8 y
spin7/2
nuclear quadrupole moment
-0,116 ± 0,002
opdagelsesdato1950
Paritet-
decay modeIntensitet
β− (β− decay)100%

40Ar

mass number40
neutron number22
Relative Atomic Mass
39,96238312204 ± 0,00000000234 Da
g-factor
0
natural abundance
99,6035 ± 0,025
radioaktivitetstable isotope
halveringstidNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
opdagelsesdato1920
Paritet+

41Ar

mass number41
neutron number23
Relative Atomic Mass
40,96450057 ± 0,000000372 Da
g-factor
-0,37428571428571 ± 0,0022857142857143
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
109,61 ± 0,04 m
spin7/2
nuclear quadrupole moment
-0,042 ± 0,004
opdagelsesdato1936
Paritet-
decay modeIntensitet
β− (β− decay)100%

42Ar

mass number42
neutron number24
Relative Atomic Mass
41,963045737 ± 0,0000062 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
32,9 ± 1,1 y
spin0
nuclear quadrupole moment
0
opdagelsesdato1952
Paritet+
decay modeIntensitet
β− (β− decay)100%

43Ar

mass number43
neutron number25
Relative Atomic Mass
42,965636056 ± 0,0000057 Da
g-factor
-0,4088 ± 0,0024
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
5,37 ± 0,06 m
spin5/2
nuclear quadrupole moment
0,142 ± 0,014
opdagelsesdato1969
Paritet
decay modeIntensitet
β− (β− decay)100%

44Ar

mass number44
neutron number26
Relative Atomic Mass
43,964923814 ± 0,0000017 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
11,87 ± 0,05 m
spin0
nuclear quadrupole moment
0
opdagelsesdato1969
Paritet+
decay modeIntensitet
β− (β− decay)100%

45Ar

mass number45
neutron number27
Relative Atomic Mass
44,968039731 ± 0,00000055 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
21,48 ± 0,15 s
spin5/2
nuclear quadrupole moment
opdagelsesdato1974
Paritet-
decay modeIntensitet
β− (β− decay)100%

46Ar

mass number46
neutron number28
Relative Atomic Mass
45,968039244 ± 0,0000025 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
8,4 ± 0,6 s
spin0
nuclear quadrupole moment
0
opdagelsesdato1974
Paritet+
decay modeIntensitet
β− (β− decay)100%

47Ar

mass number47
neutron number29
Relative Atomic Mass
46,972767112 ± 0,0000013 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
1,23 ± 0,03 s
spin3/2
nuclear quadrupole moment
opdagelsesdato1985
Paritet
decay modeIntensitet
β− (β− decay)100%
β− n (β−-delayed neutron emission)0.2%

48Ar

mass number48
neutron number30
Relative Atomic Mass
47,976001 ± 0,000018 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
415 ± 15 ms
spin0
nuclear quadrupole moment
0
opdagelsesdato2004
Paritet+
decay modeIntensitet
β− (β− decay)100%
β− n (β−-delayed neutron emission)38%

49Ar

mass number49
neutron number31
Relative Atomic Mass
48,981685 ± 0,000429 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
236 ± 8 ms
spin3/2
nuclear quadrupole moment
opdagelsesdato1989
Paritet-
decay modeIntensitet
β− (β− decay)100%
β− n (β−-delayed neutron emission)29%
2n (2-neutron emission)

50Ar

mass number50
neutron number32
Relative Atomic Mass
49,985797 ± 0,000537 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
106 ± 6 ms
spin0
nuclear quadrupole moment
0
opdagelsesdato1989
Paritet+
decay modeIntensitet
β− (β− decay)100%
β− n (β−-delayed neutron emission)37%
2n (2-neutron emission)

51Ar

mass number51
neutron number33
Relative Atomic Mass
50,993033 ± 0,000429 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
spin1/2
nuclear quadrupole moment
0
opdagelsesdato1989
Paritet-
decay modeIntensitet
β− (β− decay)
β− n (β−-delayed neutron emission)
2n (2-neutron emission)

52Ar

mass number52
neutron number34
Relative Atomic Mass
51,998519 ± 0,000644 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
spin0
nuclear quadrupole moment
0
opdagelsesdato2009
Paritet+
decay modeIntensitet
β− (β− decay)
β− n (β−-delayed neutron emission)
2n (2-neutron emission)

53Ar

mass number53
neutron number35
Relative Atomic Mass
53,00729 ± 0,00075 Da
g-factor
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
spin5/2
nuclear quadrupole moment
opdagelsesdato2009
Paritet-
decay modeIntensitet
β− (β− decay)
β− n (β−-delayed neutron emission)
2n (2-neutron emission)

54Ar

mass number54
neutron number36
Relative Atomic Mass
54,013484 ± 0,000859 Da
g-factor
0
natural abundance
radioaktivitet☢️ radioactive element
halveringstid
spin0
nuclear quadrupole moment
0
opdagelsesdato2018
Paritet+
decay modeIntensitet
β− (β− decay)
β− n (β−-delayed neutron emission)
2n (2-neutron emission)
Argon ice 1

historie

opdager eller opfinderSir William Ramsey, Baron Rayleigh
fundstedScotland
opdagelsesdato1894
etymologiGreek: argos (inactive).
udtaleAR-gon (engelsk)

source

Forekomst
Abundance in Earth's crust
3,5 mg/kg
natural abundance (verdenshave)
0,45 mg/L
natural abundance (menneskelige krop)
natural abundance (Meteoroid)
natural abundance (Solen)
0,007 %
Abundance in Universe
0,02 %

Nuclear Screening Constants

1s0.4925
2p3.9918
2s5.7696
3p11.2359
3s10.2432
Argon on ChemicalAid