Cripton

Cripton (Kr)

chemical element with symbol Kr and atomic number 36; rare gas
Atomic Number36
Atomic Weight83.798
mass number84
Group18
Period4
Blockp
proton36 p+
neutron48 n0
electron36 e-
Animated Bohr model of Kr (Cripton)

Proprietat Fisica

Rai Atomic
molar volume
covalent radius
117 pm
Metallic Radius
ionic radius
Crystal Radius
Rai de van der Waals
202 pm
densitat
0.003425 g/cm³

Chemical Property

energia
proton affinity
424.6 kJ/mol
electron affinity
ionization energy
13.9996049 eV/particle
ionization energy of Kr (Cripton)
enthalpy of vaporization
9.05 kJ/mol
enthalpy of fusion
standard enthalpy of formation
electron
electron shell2, 8, 18, 8
Bohr model: Kr (Cripton)
valence electron8
Lewis structure: Kr (Cripton)
electron configuration[Ar] 3d10 4s2 4p6
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6
Enhanced Bohr model of Kr (Cripton)
Orbital Diagram of Kr (Cripton)
oxidation number0, 1, 2
Electronegativitat
Electrophilicity Index
fundamental state of matter
estat de la matèriaGas
gaseous state of matterMonoatomic
Boiling Point
119.735 K
Melting Point
115.78 K
critical pressure
5.525 MPa
critical temperature
209.48 K
Ponch triple
115.775 K
73.53 kPa
appearance
Color
Colorless
appearancecolorless gas, exhibiting a whitish glow in a high electric field
Indici de refraccion
1.000427
thermodynamic material property
Thermal Conductivity
0.0095 W/(m K)
thermal expansion
molar heat capacity
20.786 J/(mol K)
Specific Heat Capacity
0.248 J/(g⋅K)
heat capacity ratio5/3
electrical properties
type
electrical conductivity
electrical resistivity
superconductivity
magnetism
typediamagnetic
magnetic susceptibility (Mass)
-0.0000000044 m³/Kg
magnetic susceptibility (Molar)
-0.000000000369 m³/mol
magnetic susceptibility (Volume)
-0.0000000165
magnetic ordering
Curie temperature
Néel temperature
estructura
Crystal StructureFace Centered Cubic (FCC)
lattice constant
5.72 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
Duretat
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
1120 m/s
classification
CategoryNoble gases, Noble gases
CAS GroupVIII
IUPAC GroupVIIIA
Glawe Number4
Mendeleev Number115
Pettifor Number4
Geochemical Classvolatile
Goldschmidt classificationatmophile

other

Gas Basicity
402.4 kJ/mol
polarizability
16.78 ± 0.02 a₀
C6 Dispersion Coefficient
130 a₀
allotrope
Neutron cross section
25
Neutron Mass Absorption
0.013
quantum number1S0
space group225 (Fm_3m)

Isotopes of Krypton

Stable Isotopes4
Unstable Isotopes31
Natural Isotopes6
Isotopic Composition8456.99%8456.99%8617.28%8617.28%8211.59%8211.59%8311.50%8311.50%802.29%802.29%780.36%780.36%

67Kr

mass number67
neutron number31
relative atomic mass
66.983305 ± 0.000455 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
7.4 ± 2.9 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta2016
parity-

decay modeintensity
2p (2-proton emission)37%
β+ (β+ decay; β+ = ϵ + e+)

68Kr

mass number68
neutron number32
relative atomic mass
67.972489 ± 0.000537 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
21.6 ± 3.3 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta2016
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)90%
p (proton emission)

69Kr

mass number69
neutron number33
relative atomic mass
68.965496 ± 0.000322 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
27.9 ± 0.8 ms
Espin5/2
nuclear quadrupole moment
data de descobèrta1995
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)94%

70Kr

mass number70
neutron number34
relative atomic mass
69.955877 ± 0.000215 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
45 ± 0.14 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1995
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)1.3%

71Kr

mass number71
neutron number35
relative atomic mass
70.950265695 ± 0.000138238 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
98.8 ± 0.3 ms
Espin5/2
nuclear quadrupole moment
data de descobèrta1981
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)2.1%

72Kr

mass number72
neutron number36
relative atomic mass
71.942092406 ± 0.0000086 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
17.16 ± 0.18 s
Espin0
nuclear quadrupole moment
0
data de descobèrta1973
parity+

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

73Kr

mass number73
neutron number37
relative atomic mass
72.939289193 ± 0.000007061 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
27.3 ± 1 s
Espin3/2
nuclear quadrupole moment
data de descobèrta1972
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.25%

74Kr

mass number74
neutron number38
relative atomic mass
73.933084016 ± 0.000002161 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
11.5 ± 0.11 m
Espin0
nuclear quadrupole moment
0
data de descobèrta1960
parity+

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

75Kr

mass number75
neutron number39
relative atomic mass
74.930945744 ± 0.0000087 Da
g-factor
-0.2124 ± 0.0016
natural abundance
Radioactivitat☢️ radioactive element
Semivida
4.6 ± 0.07 m
Espin5/2
nuclear quadrupole moment
1.137 ± 0.013
data de descobèrta1960
parity+

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

76Kr

mass number76
neutron number40
relative atomic mass
75.925910743 ± 0.000004308 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
14.8 ± 0.1 h
Espin0
nuclear quadrupole moment
0
data de descobèrta1954
parity+

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

77Kr

mass number77
neutron number41
relative atomic mass
76.924669999 ± 0.0000021 Da
g-factor
-0.2332 ± 0.0012
natural abundance
Radioactivitat☢️ radioactive element
Semivida
72.6 ± 0.9 m
Espin5/2
nuclear quadrupole moment
0.948 ± 0.01
data de descobèrta1948
parity+

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

78Kr

mass number78
neutron number42
relative atomic mass
77.920366341 ± 0.000000329 Da
g-factor
0
natural abundance
0.355 ± 0.003
Radioactivitat☢️ radioactive element
Semivida
Espin0
nuclear quadrupole moment
0
data de descobèrta1920
parity+

decay modeintensity
+ (double β+ decay)

79Kr

mass number79
neutron number43
relative atomic mass
78.920082919 ± 0.000003736 Da
g-factor
1.072 ± 0.004
natural abundance
Radioactivitat☢️ radioactive element
Semivida
35.04 ± 0.1 h
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1948
parity-

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

80Kr

mass number80
neutron number44
relative atomic mass
79.91637794 ± 0.000000745 Da
g-factor
0
natural abundance
2.286 ± 0.01
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin0
nuclear quadrupole moment
0
data de descobèrta1920
parity+

81Kr

mass number81
neutron number45
relative atomic mass
80.916589703 ± 0.000001152 Da
g-factor
-0.25914285714286 ± 0.00057142857142857
natural abundance
Radioactivitat☢️ radioactive element
Semivida
229 ± 11 ky
Espin7/2
nuclear quadrupole moment
0.644 ± 0.004
data de descobèrta1950
parity+

decay modeintensity
ϵ (electron capture)100%

82Kr

mass number82
neutron number46
relative atomic mass
81.91348115368 ± 0.00000000591 Da
g-factor
0
natural abundance
11.593 ± 0.031
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin0
nuclear quadrupole moment
0
data de descobèrta1920
parity+

83Kr

mass number83
neutron number47
relative atomic mass
82.914126516 ± 0.000000009 Da
g-factor
-0.21571777777778 ± 0.00000066666666666667
natural abundance
11.5 ± 0.019
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin9/2
nuclear quadrupole moment
0.259 ± 0.001
data de descobèrta1920
parity+

84Kr

mass number84
neutron number48
relative atomic mass
83.91149772708 ± 0.0000000041 Da
g-factor
0
natural abundance
56.987 ± 0.015
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin0
nuclear quadrupole moment
0
data de descobèrta1920
parity+

85Kr

mass number85
neutron number49
relative atomic mass
84.91252726 ± 0.000002147 Da
g-factor
-0.22344444444444 ± 0.000088888888888889
natural abundance
Radioactivitat☢️ radioactive element
Semivida
10.728 ± 0.007 y
Espin9/2
nuclear quadrupole moment
0.443 ± 0.003
data de descobèrta1940
parity+

decay modeintensity
β (β decay)100%

86Kr

mass number86
neutron number50
relative atomic mass
85.91061062468 ± 0.00000000399 Da
g-factor
0
natural abundance
17.279 ± 0.041
Radioactivitat☢️ radioactive element
Semivida
Espin0
nuclear quadrupole moment
0
data de descobèrta1920
parity+

decay modeintensity
(double β decay)

87Kr

mass number87
neutron number51
relative atomic mass
86.913354759 ± 0.000000264 Da
g-factor
-0.4088 ± 0.0008
natural abundance
Radioactivitat☢️ radioactive element
Semivida
76.3 ± 0.5 m
Espin5/2
nuclear quadrupole moment
-0.3 ± 0.003
data de descobèrta1940
parity+

decay modeintensity
β (β decay)100%

88Kr

mass number88
neutron number52
relative atomic mass
87.914447879 ± 0.0000028 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
2.825 ± 0.019 h
Espin0
nuclear quadrupole moment
0
data de descobèrta1939
parity+

decay modeintensity
β (β decay)100%

89Kr

mass number89
neutron number53
relative atomic mass
88.917835449 ± 0.0000023 Da
g-factor
-0.22 ± 0.002
natural abundance
Radioactivitat☢️ radioactive element
Semivida
3.15 ± 0.04 m
Espin3/2
nuclear quadrupole moment
0.166 ± 0.002
data de descobèrta1940
parity+

decay modeintensity
β (β decay)100%

90Kr

mass number90
neutron number54
relative atomic mass
89.919527929 ± 0.000002 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
32.32 ± 0.09 s
Espin0
nuclear quadrupole moment
0
data de descobèrta1951
parity+

decay modeintensity
β (β decay)100%

91Kr

mass number91
neutron number55
relative atomic mass
90.923806309 ± 0.0000024 Da
g-factor
-0.2332 ± 0.0008
natural abundance
Radioactivitat☢️ radioactive element
Semivida
8.57 ± 0.04 s
Espin5/2
nuclear quadrupole moment
0.303 ± 0.006
data de descobèrta1951
parity+

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

92Kr

mass number92
neutron number56
relative atomic mass
91.926173092 ± 0.0000029 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.84 ± 0.008 s
Espin0
nuclear quadrupole moment
0
data de descobèrta1951
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.0332%

93Kr

mass number93
neutron number57
relative atomic mass
92.931147172 ± 0.0000027 Da
g-factor
-0.826 ± 0.004
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.287 ± 0.01 s
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1951
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)1.95%

94Kr

mass number94
neutron number58
relative atomic mass
93.934140452 ± 0.000013 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
212 ± 4 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1972
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)1.11%

95Kr

mass number95
neutron number59
relative atomic mass
94.939710922 ± 0.00002 Da
g-factor
-0.82 ± 0.006
natural abundance
Radioactivitat☢️ radioactive element
Semivida
114 ± 3 ms
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1994
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)2.87%
2n (2-neutron emission)

96Kr

mass number96
neutron number60
relative atomic mass
95.943014473 ± 0.000020695 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
80 ± 8 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1994
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)3.7%

97Kr

mass number97
neutron number61
relative atomic mass
96.949088782 ± 0.00014 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
62.2 ± 3.2 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1997
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)6.7%
2n (2-neutron emission)

98Kr

mass number98
neutron number62
relative atomic mass
97.952635 ± 0.000322 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
42.8 ± 3.6 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1997
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)7%
2n (2-neutron emission)

99Kr

mass number99
neutron number63
relative atomic mass
98.958776 ± 0.000429 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
40 ± 11 ms
Espin5/2
nuclear quadrupole moment
data de descobèrta1997
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)11%
2n (2-neutron emission)

100Kr

mass number100
neutron number64
relative atomic mass
99.962995 ± 0.000429 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
12 ± 8 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1997
parity+

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

101Kr

mass number101
neutron number65
relative atomic mass
100.969318 ± 0.000537 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin5/2
nuclear quadrupole moment
data de descobèrta2010
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Krypton discharge tube

istòria

descobridor o inventaireSir William Ramsey, M.W. Travers
luòc de descobèrtaGreat Britain
data de descobèrta1898
EtimologiaGreek: kryptos (hidden).
pronunciationKRIP-ton (English)

source

Abundance
Abundance in Earth's crust
0.0001 mg/kg
natural abundance (Ocean)
0.00021 mg/L
natural abundance (còs uman)
natural abundance (meteoroid)
natural abundance (Solelh)
Abundance in Universe
0.000004 %

Nuclear Screening Constants

1s0.7684
2p3.953
2s9.602
3d15.3741
3p15.5658
3s14.9673
4p26.2308
4s24.6844