Argon

Argon (Ar)

hemijski element sa simbolom Ar i atomskim brojem 18
Atomic Number18
Atomic Weight39.948
Maseni broj40
Group18
Period3
Blockp
Proton18 p+
Neutron22 n0
Elektron18 e-
Animated Bohrov model atoma of Ar (Argon)

Physical Property

Atomski Radijus
71 pm
Molarni volumen
covalent radius
96 pm
Metallic Radius
Ionski radijus
Crystal Radius
Van der Waalsov radijus
188 pm
gustoća
0,001633 g/cm³
Atomic Radii Of The Elements: Argon0102030405060708090100110120130140150160170180190pmAtomski RadijusCovalent RadiusMetallic RadiusVan der Waalsov radijus

Chemical Property

energija
proton affinity
369,2 kJ/mol
electron affinity
ionization energy
15,7596112 eV/particle
ionization energy of Ar (Argon)
Toplota isparavanja
6,52 kJ/mol
toplota topljenja
standard enthalpy of formation
Elektron
electron shell2, 8, 8
Bohrov model atoma: Ar (Argon)
Valentni elektron8
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)
oksidacijsko stanje0
Elektronegativnost
Electrophilicity Index
0,0832013314590371 eV/particle
fundamental state of matter
agregatno stanjeGas
gaseous state of matterMonoatomic
Boiling Point
87,302 K
Melting Point
83,81 K
critical pressure
4,863 MPa
Kritična temperatura
150,687 K
Trojna tačka
83,8058 K
68,89 kPa
appearance
boja
Colorless
appearancecolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Indeks prelamanja
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
Specifična električna provodljivost
electrical resistivity
Superprovodljivost
Magnetizam
typediamagnetic
magnetic susceptibility (Mass)
-0,000000006 m³/Kg
magnetic susceptibility (Molar)
-0,00000000024 m³/mol
magnetic susceptibility (Volume)
-0,0000000107
magnetic ordering
Kirijeva tačka
Néel temperature
struktura
Crystal StructureFace Centered Cubic (FCC)
lattice constant
5,26 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Brzina zvuka
319 m/s
klasifikacija
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
Kvantni brojevi1S0
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

Maseni broj29
broj neutrona11
relative atomic mass
29,040761 ± 0,000471 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
datum otkrića2018
parity+

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

30Ar

Maseni broj30
broj neutrona12
relative atomic mass
30,023694 ± 0,000192 Da
g-factor
0
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
datum otkrića2015
parity+

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

31Ar

Maseni broj31
broj neutrona13
relative atomic mass
31,012158 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
15 ± 0,3 ms
spin5/2
nuclear quadrupole moment
datum otkrića1986
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

Maseni broj32
broj neutrona14
relative atomic mass
31,997637824 ± 0,0000019 Da
g-factor
0
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
98 ± 2 ms
spin0
nuclear quadrupole moment
0
datum otkrića1977
parity+

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

33Ar

Maseni broj33
broj neutrona15
relative atomic mass
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
datum otkrića1964
parity+

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

34Ar

Maseni broj34
broj neutrona16
relative atomic mass
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
datum otkrića1966
parity+

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

35Ar

Maseni broj35
broj neutrona17
relative atomic mass
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
datum otkrića1940
parity+

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

36Ar

Maseni broj36
broj neutrona18
relative atomic mass
35,967545106 ± 0,000000028 Da
g-factor
0
natural abundance
0,3336 ± 0,021
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
datum otkrića1920
parity+

decay modeintensity
+ (double β+ decay)

37Ar

Maseni broj37
broj neutrona19
relative atomic mass
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
datum otkrića1941
parity+

decay modeintensity
ϵ (electron capture)100%

38Ar

Maseni broj38
broj neutrona20
relative atomic mass
37,962732102 ± 0,000000209 Da
g-factor
0
natural abundance
0,0629 ± 0,007
Radioaktivnoststable isotope
Vrijeme poluraspadaNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
datum otkrića1934
parity+

39Ar

Maseni broj39
broj neutrona21
relative atomic mass
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
datum otkrića1950
parity-

decay modeintensity
β (β decay)100%

40Ar

Maseni broj40
broj neutrona22
relative atomic mass
39,96238312204 ± 0,00000000234 Da
g-factor
0
natural abundance
99,6035 ± 0,025
Radioaktivnoststable isotope
Vrijeme poluraspadaNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
datum otkrića1920
parity+

41Ar

Maseni broj41
broj neutrona23
relative atomic mass
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
datum otkrića1936
parity-

decay modeintensity
β (β decay)100%

42Ar

Maseni broj42
broj neutrona24
relative atomic mass
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
datum otkrića1952
parity+

decay modeintensity
β (β decay)100%

43Ar

Maseni broj43
broj neutrona25
relative atomic mass
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
datum otkrića1969
parity

decay modeintensity
β (β decay)100%

44Ar

Maseni broj44
broj neutrona26
relative atomic mass
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
datum otkrića1969
parity+

decay modeintensity
β (β decay)100%

45Ar

Maseni broj45
broj neutrona27
relative atomic mass
44,968039731 ± 0,00000055 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
21,48 ± 0,15 s
spin5/2
nuclear quadrupole moment
datum otkrića1974
parity-

decay modeintensity
β (β decay)100%

46Ar

Maseni broj46
broj neutrona28
relative atomic mass
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
datum otkrića1974
parity+

decay modeintensity
β (β decay)100%

47Ar

Maseni broj47
broj neutrona29
relative atomic mass
46,972767112 ± 0,0000013 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,23 ± 0,03 s
spin3/2
nuclear quadrupole moment
datum otkrića1985
parity

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

48Ar

Maseni broj48
broj neutrona30
relative atomic mass
47,976001 ± 0,000018 Da
g-factor
0
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
415 ± 15 ms
spin0
nuclear quadrupole moment
0
datum otkrića2004
parity+

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

49Ar

Maseni broj49
broj neutrona31
relative atomic mass
48,981685 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
236 ± 8 ms
spin3/2
nuclear quadrupole moment
datum otkrića1989
parity-

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

50Ar

Maseni broj50
broj neutrona32
relative atomic mass
49,985797 ± 0,000537 Da
g-factor
0
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
106 ± 6 ms
spin0
nuclear quadrupole moment
0
datum otkrića1989
parity+

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

51Ar

Maseni broj51
broj neutrona33
relative atomic mass
50,993033 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin1/2
nuclear quadrupole moment
0
datum otkrića1989
parity-

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

52Ar

Maseni broj52
broj neutrona34
relative atomic mass
51,998519 ± 0,000644 Da
g-factor
0
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
datum otkrića2009
parity+

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

53Ar

Maseni broj53
broj neutrona35
relative atomic mass
53,00729 ± 0,00075 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
datum otkrića2009
parity-

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

54Ar

Maseni broj54
broj neutrona36
relative atomic mass
54,013484 ± 0,000859 Da
g-factor
0
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin0
nuclear quadrupole moment
0
datum otkrića2018
parity+

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

historija

otkrivač ili izumiteljSir William Ramsey, Baron Rayleigh
mjesto otkrićaScotland
datum otkrića1894
EtimologijaGreek: argos (inactive).
pronunciationAR-gon (engleski)

izvor

Abundance
Abundance in Earth's crust
3,5 mg/kg
natural abundance (okean)
0,45 mg/L
natural abundance (ljudsko tijelo)
natural abundance (Meteoroidi)
natural abundance (Sunce)
0,007 %
Abundance in Universe
0,02 %

Nuclear Screening Constants

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