ئارگون

ئارگون (Ar)

chemical element with symbol Ar and atomic number 18; rare gas
Atomic Number18
Atomic Weight39.948
mass number40
Group18
Period3
Blockp
پروتون18 p+
neutron22 n0
ئېلېكترون18 e-
Animated بورمودىلى of Ar (ئارگون)

Physical Property

Atomic Radius
71 pm
molar volume
covalent radius
96 pm
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
188 pm
density
0.001633 g/cm³
Atomic Radii Of The Elements: ئارگون0102030405060708090100110120130140150160170180190pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

ئېنېرگىيە
proton affinity
369.2 kJ/mol
electron affinity
ionization energy
15.7596112 eV/particle
ionization energy of Ar (ئارگون)
enthalpy of vaporization
6.52 kJ/mol
enthalpy of fusion
standard enthalpy of formation
ئېلېكترون
ئېلېكترون قەۋەت2, 8, 8
بورمودىلى: Ar (ئارگون)
valence electron8
Lewis structure: Ar (ئارگون)
electron configuration[Ne] 3s2 3p6
1s2 2s2 2p6 3s2 3p6
Enhanced بورمودىلى of Ar (ئارگون)
Orbital Diagram of Ar (ئارگون)
oxidation number0
electronegativity
Electrophilicity Index
0.0832013314590371 eV/particle
fundamental state of matter
phase of matterGas
gaseous state of matterMonoatomic
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
color
Colorless
appearancecolorless 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
heat capacity ratio5/3
electrical properties
type
electrical conductivity
electrical resistivity
superconductivity
magnetism
typediamagnetic
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
structure
Crystal StructureFace Centered Cubic (FCC)
lattice constant
5.26 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
319 m/s
classification
CategoryNoble gases, Noble gases
CAS GroupVIII
IUPAC GroupVIIIA
Glawe Number3
Mendeleev Number114
Pettifor Number3
Geochemical Classvolatile
Goldschmidt classificationatmophile

other

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
space group225 (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
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
time of discovery or invention2018
parity+

decay modeintensity
2p (2-proton emission)100%

30Ar

mass number30
neutron number12
relative atomic mass
30.023694 ± 0.000192 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2015
parity+

decay modeintensity
2p (2-proton emission)100%

31Ar

mass number31
neutron number13
relative atomic mass
31.012158 ± 0.000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
15 ± 0.3 ms
spin5/2
nuclear quadrupole moment
time of discovery or invention1986
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
98 ± 2 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1977
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
173 ± 2 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1964
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
846.46 ± 0.35 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1966
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
1.7756 ± 0.001 s
spin3/2
nuclear quadrupole moment
-0.084 ± 0.015
time of discovery or invention1940
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1920
parity+

decay modeintensity
+ (double β+ decay)

37Ar

mass number37
neutron number19
relative atomic mass
36.966776301 ± 0.000000221 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
35.011 ± 0.019 d
spin3/2
nuclear quadrupole moment
0.076 ± 0.003
time of discovery or invention1941
parity+

decay modeintensity
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
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

39Ar

mass number39
neutron number21
relative atomic mass
38.964313037 ± 0.000005367 Da
g-factor
-0.45428571428571 ± 0.0042857142857143
natural abundance
radioactivity☢️ radioactive element
half-life
268 ± 8 y
spin7/2
nuclear quadrupole moment
-0.116 ± 0.002
time of discovery or invention1950
parity-

decay modeintensity
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
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1920
parity+

41Ar

mass number41
neutron number23
relative atomic mass
40.96450057 ± 0.000000372 Da
g-factor
-0.37428571428571 ± 0.0022857142857143
natural abundance
radioactivity☢️ radioactive element
half-life
109.61 ± 0.04 m
spin7/2
nuclear quadrupole moment
-0.042 ± 0.004
time of discovery or invention1936
parity-

decay modeintensity
β (β decay)100%

42Ar

mass number42
neutron number24
relative atomic mass
41.963045737 ± 0.0000062 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
32.9 ± 1.1 y
spin0
nuclear quadrupole moment
0
time of discovery or invention1952
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
5.37 ± 0.06 m
spin5/2
nuclear quadrupole moment
0.142 ± 0.014
time of discovery or invention1969
parity

decay modeintensity
β (β decay)100%

44Ar

mass number44
neutron number26
relative atomic mass
43.964923814 ± 0.0000017 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
11.87 ± 0.05 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1969
parity+

decay modeintensity
β (β decay)100%

45Ar

mass number45
neutron number27
relative atomic mass
44.968039731 ± 0.00000055 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
21.48 ± 0.15 s
spin5/2
nuclear quadrupole moment
time of discovery or invention1974
parity-

decay modeintensity
β (β decay)100%

46Ar

mass number46
neutron number28
relative atomic mass
45.968039244 ± 0.0000025 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
8.4 ± 0.6 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1974
parity+

decay modeintensity
β (β decay)100%

47Ar

mass number47
neutron number29
relative atomic mass
46.972767112 ± 0.0000013 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.23 ± 0.03 s
spin3/2
nuclear quadrupole moment
time of discovery or invention1985
parity

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
415 ± 15 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention2004
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
236 ± 8 ms
spin3/2
nuclear quadrupole moment
time of discovery or invention1989
parity-

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
106 ± 6 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1989
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1989
parity-

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2009
parity+

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
spin5/2
nuclear quadrupole moment
time of discovery or invention2009
parity-

decay modeintensity
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
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Argon ice 1

تارىخ

discoverer or inventorSir William Ramsey, Baron Rayleigh
location of discoveryScotland
time of discovery or invention1894
etymologyGreek: argos (inactive).
pronunciationAR-gon (ئىنگلىزچە)

source

Abundance
Abundance in Earth's crust
3.5 mg/kg
natural abundance (ئوكيانىيە)
0.45 mg/L
natural abundance (human body)
natural abundance (meteoroid)
natural abundance (قۇياش)
0.007 %
Abundance in Universe
0.02 %

Nuclear Screening Constants

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