Argón

Argón (Ar)

chemical element with symbol Ar and atomic number 18; rare gas
Atomic Number18
Atomic Weight39.948
Numero masico40
Group18
Period3
Blockp
Protón18 p+
Neutrón22 n0
Electrón18 e-
Animated Modelo atomico de Bohr of Ar (Argón)

Physical Property

Radio Atomico
molar volume
Radio covalent
Metallic Radius
Radio ionico
Crystal Radius
Radio de van der Waals
density
Atomic Radii Of The Elements: Argón0102030405060708090100110120130140150160170180190pmRadio AtomicoRadio CovalentMetallic RadiusRadio de van der Waals

Chemical Property

enerchía
proton affinity
Afinidat electronica
ionization energy
ionization energy of Ar (Argón)
Entalpía de vaporización
entalpía de fusión
standard enthalpy of formation
Electrón
electron shell2, 8, 8
Modelo atomico de Bohr: Ar (Argón)
valence electron8
Lewis structure: Ar (Argón)
electron configuration[Ne] 3s2 3p6
1s2 2s2 2p6 3s2 3p6
Enhanced Modelo atomico de Bohr of Ar (Argón)
Orbital Diagram of Ar (Argón)
Numero d'oxidación0
Electronegatividat
Electrophilicity Index
fundamental state of matter
phase of matterGas
gaseous state of matterMonoatomic
Boiling Point
Melting Point
critical pressure
critical temperature
Punto triple
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
thermal expansion
molar heat capacity
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
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
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
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

Numero masico29
neutron number11
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin5/2
nuclear quadrupole moment
time of discovery or invention2018
parity+

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

30Ar

Numero masico30
neutron number12
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin0
nuclear quadrupole moment
0
time of discovery or invention2015
parity+

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

31Ar

Numero masico31
neutron number13
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico32
neutron number14
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico33
neutron number15
Relative Atomic Mass
g-factor
-1.446 ± 0.012
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico34
neutron number16
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico35
neutron number17
Relative Atomic Mass
g-factor
0.42133333333333 ± 0.00013333333333333
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico36
neutron number18
Relative Atomic Mass
g-factor
0
natural abundance
0.3336 ± 0.021
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin0
nuclear quadrupole moment
0
time of discovery or invention1920
parity+

decay modeintensity
+ (double β+ decay)

37Ar

Numero masico37
neutron number19
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico38
neutron number20
Relative Atomic Mass
g-factor
0
natural abundance
0.0629 ± 0.007
Radioactividatstable isotope
Periodo de semidesintegraciónNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

39Ar

Numero masico39
neutron number21
Relative Atomic Mass
g-factor
-0.45428571428571 ± 0.0042857142857143
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico40
neutron number22
Relative Atomic Mass
g-factor
0
natural abundance
99.6035 ± 0.025
Radioactividatstable isotope
Periodo de semidesintegraciónNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1920
parity+

41Ar

Numero masico41
neutron number23
Relative Atomic Mass
g-factor
-0.37428571428571 ± 0.0022857142857143
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico42
neutron number24
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
32.9 ± 1.1 y
spin0
nuclear quadrupole moment
0
time of discovery or invention1952
parity+

decay modeintensity
β (β decay)100%

43Ar

Numero masico43
neutron number25
Relative Atomic Mass
g-factor
-0.4088 ± 0.0024
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico44
neutron number26
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
11.87 ± 0.05 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1969
parity+

decay modeintensity
β (β decay)100%

45Ar

Numero masico45
neutron number27
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
21.48 ± 0.15 s
spin5/2
nuclear quadrupole moment
time of discovery or invention1974
parity-

decay modeintensity
β (β decay)100%

46Ar

Numero masico46
neutron number28
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
8.4 ± 0.6 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1974
parity+

decay modeintensity
β (β decay)100%

47Ar

Numero masico47
neutron number29
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico48
neutron number30
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico49
neutron number31
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico50
neutron number32
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico51
neutron number33
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico52
neutron number34
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico53
neutron number35
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

Numero masico54
neutron number36
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
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

historia

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

source

Abundance
Abundance in Earth's crust
natural abundance (ocián)
natural abundance (human body)
natural abundance (meteoroid)
natural abundance (Sol)
0.007 %
Abundance in Universe
0.02 %

Nuclear Screening Constants

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