Argon

Argon (Ar)

chemical element with symbol Ar and atomic number 18; rare gas
Atomic Number18
Atomic Weight39.948
Massagetal40
Group18
Period3
Blockp
proton18 p+
neutron22 n0
elektron18 e-
Animated Bohr model of Ar (Argon)

Physical Property

Atoomradius
molar volume
Covalent Radius
Metallic Radius
Ioonradius
Crystal Radius
Van der Waals radius
density
Atomic Radii Of The Elements: Argon0102030405060708090100110120130140150160170180190pmAtoomradiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energie
proton affinity
electron affinity
ionization energy
ionization energy of Ar (Argon)
Verdampingswarmte
smeltingswarmte
Vormingsentalpie
elektron
Elektronskil2, 8, 8
Bohr model: Ar (Argon)
Valenselektrone8
Lewisteorie: Ar (Argon)
elektronkonfigurasie[Ne] 3s2 3p6
1s2 2s2 2p6 3s2 3p6
Enhanced Bohr model of Ar (Argon)
Orbital Diagram of Ar (Argon)
Oksidasietoestand0
Elektronegatiwiteit
Electrophilicity Index
fundamental state of matter
phase of matterGas
gaseous state of matterMonoatomic
Boiling Point
Melting Point
critical pressure
critical temperature
triple point
appearance
kleur
Colorless
appearancecolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Brekingsindeks
1,000281
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio5/3
electrical properties
type
Geleidingsvermoë
Elektriese resistiwiteit
superconductivity
Magnetisme
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
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
Massamodulus
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank
classification
CategoryNoble gases, Noble gases
CAS GroupVIII
IUPAC GroupVIIIA
Glawe Number3
Mendeleev Number114
Pettifor Number3
Geochemical Classvolatile
Goldschmidt classificationatmophile

other

Gas Basicity
polarizability
C6 Dispersion Coefficient
allotrope
Neutron cross section
0,66
Neutron Mass Absorption
0,00059
quantum number1S0
Ruimtegroep225 (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

Massagetal29
neutron number11
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin5/2
nuclear quadrupole moment
ontdekkingsdatum2018
parity+

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

30Ar

Massagetal30
neutron number12
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2015
parity+

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

31Ar

Massagetal31
neutron number13
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
15 ± 0,3 ms
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1986
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

Massagetal32
neutron number14
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
98 ± 2 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1977
parity+

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

33Ar

Massagetal33
neutron number15
Relative Atomic Mass
g-factor
-1,446 ± 0,012
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
173 ± 2 ms
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1964
parity+

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

34Ar

Massagetal34
neutron number16
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
846,46 ± 0,35 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1966
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

35Ar

Massagetal35
neutron number17
Relative Atomic Mass
g-factor
0,42133333333333 ± 0,00013333333333333
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,7756 ± 0,001 s
spin3/2
nuclear quadrupole moment
-0,084 ± 0,015
ontdekkingsdatum1940
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

36Ar

Massagetal36
neutron number18
Relative Atomic Mass
g-factor
0
natural abundance
0,3336 ± 0,021
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1920
parity+

decay modeintensity
+ (double β+ decay)

37Ar

Massagetal37
neutron number19
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
35,011 ± 0,019 d
spin3/2
nuclear quadrupole moment
0,076 ± 0,003
ontdekkingsdatum1941
parity+

decay modeintensity
ϵ (electron capture)100%

38Ar

Massagetal38
neutron number20
Relative Atomic Mass
g-factor
0
natural abundance
0,0629 ± 0,007
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1934
parity+

39Ar

Massagetal39
neutron number21
Relative Atomic Mass
g-factor
-0,45428571428571 ± 0,0042857142857143
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
268 ± 8 y
spin7/2
nuclear quadrupole moment
-0,116 ± 0,002
ontdekkingsdatum1950
parity-

decay modeintensity
β (β decay)100%

40Ar

Massagetal40
neutron number22
Relative Atomic Mass
g-factor
0
natural abundance
99,6035 ± 0,025
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1920
parity+

41Ar

Massagetal41
neutron number23
Relative Atomic Mass
g-factor
-0,37428571428571 ± 0,0022857142857143
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
109,61 ± 0,04 m
spin7/2
nuclear quadrupole moment
-0,042 ± 0,004
ontdekkingsdatum1936
parity-

decay modeintensity
β (β decay)100%

42Ar

Massagetal42
neutron number24
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
32,9 ± 1,1 y
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1952
parity+

decay modeintensity
β (β decay)100%

43Ar

Massagetal43
neutron number25
Relative Atomic Mass
g-factor
-0,4088 ± 0,0024
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5,37 ± 0,06 m
spin5/2
nuclear quadrupole moment
0,142 ± 0,014
ontdekkingsdatum1969
parity

decay modeintensity
β (β decay)100%

44Ar

Massagetal44
neutron number26
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11,87 ± 0,05 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1969
parity+

decay modeintensity
β (β decay)100%

45Ar

Massagetal45
neutron number27
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
21,48 ± 0,15 s
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1974
parity-

decay modeintensity
β (β decay)100%

46Ar

Massagetal46
neutron number28
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
8,4 ± 0,6 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1974
parity+

decay modeintensity
β (β decay)100%

47Ar

Massagetal47
neutron number29
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,23 ± 0,03 s
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1985
parity

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.2%

48Ar

Massagetal48
neutron number30
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
415 ± 15 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2004
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)38%

49Ar

Massagetal49
neutron number31
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
236 ± 8 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1989
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)29%
2n (2-neutron emission)

50Ar

Massagetal50
neutron number32
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
106 ± 6 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1989
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)37%
2n (2-neutron emission)

51Ar

Massagetal51
neutron number33
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1989
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

52Ar

Massagetal52
neutron number34
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2009
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

53Ar

Massagetal53
neutron number35
Relative Atomic Mass
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin5/2
nuclear quadrupole moment
ontdekkingsdatum2009
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

54Ar

Massagetal54
neutron number36
Relative Atomic Mass
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2018
parity+

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

geskiedenis

Ontdek deurSir William Ramsey, Baron Rayleigh
ligging van ontdekkingScotland
ontdekkingsdatum1894
etimologieGreek: argos (inactive).
uitspraakAR-gon (Engels)

source

Abundance
Abundance in Earth's crust
natural abundance (oseaan)
natural abundance (human body)
natural abundance (Meteoroïde)
natural abundance (Son)
0,007 %
Abundance in Universe
0,02 %

Nuclear Screening Constants

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