Argon

Argon (Ar)

chemical element with symbol Ar and atomic number 18; rare gas
Atomski broj18
Relativna atomska masa39.948
Maseni broj40
Skupina18
Perioda3
Blokp
proton18 p+
neutron22 n0
elektron18 e-
Animated Bohrov model atoma of Ar (Argon)

Physical Property

Atomski Radijus
71 pm
Molni volumen
Kovalentni Radijus
96 pm
Metallic Radius
Ionski radijus
Crystal Radius
Van der Waals radius
188 pm
gustoća
0,001633 g/cm³
Atomic Radii Of The Elements: Argon0102030405060708090100110120130140150160170180190pmAtomski RadijusKovalentni RadijusMetallic RadiusVan der Waals radius

Kemijsko Svojstvo

energija
proton affinity
369,2 kJ/mol
Elektronski afinitet
−11,5 eV/particle
ionization energy
15,7596112 eV/particle
ionization energy of Ar (Argon)
Toplina isparivanja
6,52 kJ/mol
toplina taljenja
standard enthalpy of formation
elektron
Elektronska ljuska2, 8, 8
Bohrov model atoma: Ar (Argon)
valence electron8
Lewis structure: Ar (Argon)
electron configuration[Ne] 3s2 3p6
1s2 2s2 2p6 3s2 3p6
Enhanced Bohrov model atoma of Ar (Argon)
Orbital Diagram of Ar (Argon)
Oksidacijski broj0
Elektronegativnost
Electrophilicity Index
0,0832013314590371 eV/particle
fundamental state of matter
agregatno stanjePlinovito
gaseous state of matterMonoatomic
Vrelište
87,302 K
Talište
83,81 K
critical pressure
4,863 MPa
critical temperature
150,687 K
Trojna točka
83,8058 K
68,89 kPa
appearance
boja
Bezbojan
appearancecolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Indeks prelamanja
1,000281
thermodynamic material property
Toplinska vodljivost
0,0177 W/(m K)
Toplinsko istezanje
molar heat capacity
20,786 J/(mol K)
Specifični toplinski kapacitet
heat capacity ratio5/3
electrical properties
type
electrical conductivity
Električna otpornost i provodnost
Supravodljivost
Magnetizam
typediamagnetic
Magnetna susceptibilnost (Mass)
−0,000000006 m³/Kg
Magnetna susceptibilnost (Molar)
−0,00000000024 m³/mol
Magnetna susceptibilnost (Volume)
−0,0000000107
magnetic ordering
Curieva temperatura
Néel temperature
struktura
Kristalna strukturaKubna plošno centrirana (FCC)
lattice constant
5,26 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Youngov modul elastičnosti
Poissonov omjer
brzina zvuka
319 m/s
classification
KategorijaPlemeniti plinovi, 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
Nuklearni udarni presjek
0,66
Neutron Mass Absorption
0,00059
Kvantni brojevi1S0
space group225 (Fm_3m)

Isotopes of Argon

Stabilni izotopi2
Nestabilni izotopi24
Natural Isotopes3
Isotopic Composition4099.60%4099.60%360.33%360.33%380.06%380.06%

29Ar

Maseni broj29
neutron number11
Relativna atomska masa
29,040761 ± 0,000471 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma2018
Parnost+

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

30Ar

Maseni broj30
neutron number12
Relativna atomska masa
30,023694 ± 0,000192 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma2015
Parnost+

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

31Ar

Maseni broj31
neutron number13
Relativna atomska masa
31,012158 ± 0,000215 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
15 ± 0,3 ms
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1986
Parnost+

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

Maseni broj32
neutron number14
Relativna atomska masa
31,997637824 ± 0,0000019 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
98 ± 2 ms
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1977
Parnost+

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

33Ar

Maseni broj33
neutron number15
Relativna atomska masa
32,989925545 ± 0,00000043 Da
g-factor
−1,446 ± 0,012
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
173 ± 2 ms
spin1/2
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1964
Parnost+

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

34Ar

Maseni broj34
neutron number16
Relativna atomska masa
33,980270092 ± 0,000000083 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
846,46 ± 0,35 ms
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1966
Parnost+

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

35Ar

Maseni broj35
neutron number17
Relativna atomska masa
34,975257719 ± 0,00000073 Da
g-factor
0,42133333333333 ± 0,00013333333333333
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,7756 ± 0,001 s
spin3/2
nuclear quadrupole moment
−0,084 ± 0,015
vrijeme otkrića ili izuma1940
Parnost+

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

36Ar

Maseni broj36
neutron number18
Relativna atomska masa
35,967545106 ± 0,000000028 Da
g-factor
0
natural abundance
0,3336 ± 0,021
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1920
Parnost+

decay modeintensity
+ (double β+ decay)

37Ar

Maseni broj37
neutron number19
Relativna atomska masa
36,966776301 ± 0,000000221 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
35,011 ± 0,019 d
spin3/2
nuclear quadrupole moment
0,076 ± 0,003
vrijeme otkrića ili izuma1941
Parnost+

decay modeintensity
ϵ (electron capture)100%

38Ar

Maseni broj38
neutron number20
Relativna atomska masa
37,962732102 ± 0,000000209 Da
g-factor
0
natural abundance
0,0629 ± 0,007
radioaktivnoststable isotope
Vrijeme poluraspadaNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1934
Parnost+

39Ar

Maseni broj39
neutron number21
Relativna atomska masa
38,964313037 ± 0,000005367 Da
g-factor
−0,45428571428571 ± 0,0042857142857143
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
268 ± 8 y
spin7/2
nuclear quadrupole moment
−0,116 ± 0,002
vrijeme otkrića ili izuma1950
Parnost-

decay modeintensity
β (β decay)100%

40Ar

Maseni broj40
neutron number22
Relativna atomska masa
39,96238312204 ± 0,00000000234 Da
g-factor
0
natural abundance
99,6035 ± 0,025
radioaktivnoststable isotope
Vrijeme poluraspadaNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1920
Parnost+

41Ar

Maseni broj41
neutron number23
Relativna atomska masa
40,96450057 ± 0,000000372 Da
g-factor
−0,37428571428571 ± 0,0022857142857143
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
109,61 ± 0,04 m
spin7/2
nuclear quadrupole moment
−0,042 ± 0,004
vrijeme otkrića ili izuma1936
Parnost-

decay modeintensity
β (β decay)100%

42Ar

Maseni broj42
neutron number24
Relativna atomska masa
41,963045737 ± 0,0000062 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
32,9 ± 1,1 y
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1952
Parnost+

decay modeintensity
β (β decay)100%

43Ar

Maseni broj43
neutron number25
Relativna atomska masa
42,965636056 ± 0,0000057 Da
g-factor
−0,4088 ± 0,0024
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
5,37 ± 0,06 m
spin5/2
nuclear quadrupole moment
0,142 ± 0,014
vrijeme otkrića ili izuma1969
Parnost

decay modeintensity
β (β decay)100%

44Ar

Maseni broj44
neutron number26
Relativna atomska masa
43,964923814 ± 0,0000017 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
11,87 ± 0,05 m
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1969
Parnost+

decay modeintensity
β (β decay)100%

45Ar

Maseni broj45
neutron number27
Relativna atomska masa
44,968039731 ± 0,00000055 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
21,48 ± 0,15 s
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1974
Parnost-

decay modeintensity
β (β decay)100%

46Ar

Maseni broj46
neutron number28
Relativna atomska masa
45,968039244 ± 0,0000025 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
8,4 ± 0,6 s
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1974
Parnost+

decay modeintensity
β (β decay)100%

47Ar

Maseni broj47
neutron number29
Relativna atomska masa
46,972767112 ± 0,0000013 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,23 ± 0,03 s
spin3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1985
Parnost

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

48Ar

Maseni broj48
neutron number30
Relativna atomska masa
47,976001 ± 0,000018 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
415 ± 15 ms
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma2004
Parnost+

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

49Ar

Maseni broj49
neutron number31
Relativna atomska masa
48,981685 ± 0,000429 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
236 ± 8 ms
spin3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1989
Parnost-

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

50Ar

Maseni broj50
neutron number32
Relativna atomska masa
49,985797 ± 0,000537 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
106 ± 6 ms
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1989
Parnost+

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

51Ar

Maseni broj51
neutron number33
Relativna atomska masa
50,993033 ± 0,000429 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin1/2
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1989
Parnost-

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

52Ar

Maseni broj52
neutron number34
Relativna atomska masa
51,998519 ± 0,000644 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma2009
Parnost+

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

53Ar

Maseni broj53
neutron number35
Relativna atomska masa
53,00729 ± 0,00075 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma2009
Parnost-

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

54Ar

Maseni broj54
neutron number36
Relativna atomska masa
54,013484 ± 0,000859 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma2018
Parnost+

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

povijest

otkrio/izumioSir William Ramsey, Baron Rayleigh
location of discoveryScotland
vrijeme otkrića ili izuma1894
EtimologijaGreek: argos (inactive).
pronunciationAR-gon (engleski)

source

Obilnost
Zastupljenost u Zemljinoj kori
3,5 mg/kg
natural abundance (ocean)
0,45 mg/L
natural abundance (tijelo)
natural abundance (meteoroid)
natural abundance (Sunce)
0,007 %
Zastupljenost u svemiru
0,02 %

Nuclear Screening Constants

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