Kromoa

Kromoa (Cr)

24 zenbaki atomikoa duen elementu kimikoa
Atomic Number24
Atomic Weight51.9961
masa-zenbaki52
Group6
Period4
Blockd
protoi24 p+
neutroi28 n0
elektroi24 e-
Animated Bohrren eredu atomikoa of Cr (Kromoa)

Propietate Fisiko

Erradio Atomiko
140 pm
bolumen molar
Erradio Kobalente
122 pm
Metallic Radius
119 pm
Erradio ioniko
73 pm
Crystal Radius
87 pm
Van der Waalsen erradio
206 pm
dentsitatea
7,15 g/cm³
Atomic Radii Of The Elements: Kromoa0102030405060708090100110120130140150160170180190200210pmErradio AtomikoErradio KobalenteMetallic RadiusVan der Waalsen erradio

Magnitude Fisiko

energia
proton affinity
791,3 kJ/mol
Afinitate elektroniko
ionizazio energia
6,76651 eV/particle
ionizazio energia of Cr (Kromoa)
Irakite-entalpia
342 kJ/mol
urtze-entalpia
formazio entalpia estandarra
397,48 kJ/mol
elektroi
elektroi geruza2, 8, 13, 1
Bohrren eredu atomikoa: Cr (Kromoa)
balentzia-elektroi1
Lewis egitura: Cr (Kromoa)
electron configuration[Ar] 3d5 4s1
1s2 2s2 2p6 3s2 3p6 3d5 4s1
Enhanced Bohrren eredu atomikoa of Cr (Kromoa)
Orbital Diagram of Cr (Kromoa)
Oxidazio-egoera-4, -2, -1, 0, 1, 2, 3, 4, 5, 6
Elektronegatibotasun
1.66
Electrophilicity Index
1,1319177597467263 eV/particle
materiaren funtsezko egoera
materiaren egoeraSolid
materiaren egoera gaseoso
Boiling Point
2.944,15 K
Melting Point
2.180,15 K
critical pressure
critical temperature
Puntu hirukoitz
appearance
kolore
Silver
appearancesilvery metallic
errefrakzio-indize
thermodynamic material property
Thermal Conductivity
93,9 W/(m K)
Bero-dilatazio
0,0000049 1/K
molar heat capacity
23,35 J/(mol K)
Specific Heat Capacity
0,449 J/(g⋅K)
indize adiabatiko
electrical properties
typeConductor
Eroankortasun elektriko
7,9 MS/m
Erresistibitate elektriko
0,00000013 m Ω
Supereroankortasun
Magnetismo
typeantiferromagnetic
suszeptibilitate magnetiko (Mass)
0,0000000445 m³/Kg
suszeptibilitate magnetiko (Molar)
0,000000002314 m³/mol
suszeptibilitate magnetiko (Volume)
0,0003177
magnetic ordering
Curieren tenperatura
Néel temperature
393 K
egitura
Crystal StructureBody Centered Cubic (BCC)
lattice constant
2,88 Å
Lattice Anglesπ/2, π/2, π/2
materialen propietate mekaniko
Gogortasun
8,5 MPa
konprimagarritasun-modulu
160 GPa
Zizaila modulua
115 GPa
Youngen modulu
279 GPa
Poissonen modulu
0,21
Soinuaren lastertasun
5.940 m/s
classification
CategoryTransition metals, Transition metals
CAS GroupVIA
IUPAC GroupVIB
Glawe Number55
Mendeleev Number51
Pettifor Number57
Geochemical Classfirst series transition metal
Goldschmidt classificationlitophile

beste batzuk

Gas Basicity
768,4 kJ/mol
polarizability
83 ± 12 a₀
C6 Dispersion Coefficient
602 a₀
allotrope
Neutron cross section
3,1
Neutron Mass Absorption
0,0021
zenbaki kuantiko7S3
talde espazial229 (Im_3m)

Isotopes of Chromium

Stable Isotopes3
Unstable Isotopes27
Natural Isotopes4
Isotopic Composition5283.79%5283.79%539.50%539.50%504.35%504.35%542.37%542.37%

41Cr

masa-zenbaki41
neutron number17
atomo-masa erlatibo
41,021911 ± 0,000429 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
spin3/2
nuclear quadrupole moment
aurkikuntza-data
parity+

decay modeintensity
p (proton emission)

42Cr

masa-zenbaki42
neutron number18
atomo-masa erlatibo
42,007579 ± 0,000322 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
13,3 ± 1 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1996
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)94.4%
2p (2-proton emission)

43Cr

masa-zenbaki43
neutron number19
atomo-masa erlatibo
42,997885 ± 0,000215 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
21,1 ± 0,3 ms
spin3/2
nuclear quadrupole moment
aurkikuntza-data1992
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)79.3%
2p (2-proton emission)11.6%
3p0.13%
β+α (β+-delayed α emission)

44Cr

masa-zenbaki44
neutron number20
atomo-masa erlatibo
43,985591 ± 0,000055 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
42,8 ± 0,6 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1987
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)12%

45Cr

masa-zenbaki45
neutron number21
atomo-masa erlatibo
44,97905 ± 0,000038 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
60,9 ± 0,4 ms
spin7/2
nuclear quadrupole moment
aurkikuntza-data1974
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)34.4%

46Cr

masa-zenbaki46
neutron number22
atomo-masa erlatibo
45,968360969 ± 0,000012295 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
224,3 ± 1,3 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1972
parity+

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

47Cr

masa-zenbaki47
neutron number23
atomo-masa erlatibo
46,962894995 ± 0,000005578 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
461,6 ± 1,5 ms
spin3/2
nuclear quadrupole moment
aurkikuntza-data1972
parity-

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

48Cr

masa-zenbaki48
neutron number24
atomo-masa erlatibo
47,954029431 ± 0,000007848 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
21,56 ± 0,03 h
spin0
nuclear quadrupole moment
0
aurkikuntza-data1952
parity+

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

49Cr

masa-zenbaki49
neutron number25
atomo-masa erlatibo
48,95133372 ± 0,000002363 Da
g-factor
0,1904 ± 0,0012
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
42,3 ± 0,1 m
spin5/2
nuclear quadrupole moment
aurkikuntza-data1942
parity-

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

50Cr

masa-zenbaki50
neutron number26
atomo-masa erlatibo
49,946042209 ± 0,0000001 Da
g-factor
0
natural abundance
4,345 ± 0,013
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
spin0
nuclear quadrupole moment
0
aurkikuntza-data1930
parity+

decay modeintensity
+ (double β+ decay)

51Cr

masa-zenbaki51
neutron number27
atomo-masa erlatibo
50,944765388 ± 0,000000178 Da
g-factor
0,26685714285714 ± 0,0014285714285714
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
27,7015 ± 0,0011 d
spin7/2
nuclear quadrupole moment
aurkikuntza-data1940
parity-

decay modeintensity
ϵ (electron capture)100%

52Cr

masa-zenbaki52
neutron number28
atomo-masa erlatibo
51,940504714 ± 0,00000012 Da
g-factor
0
natural abundance
83,789 ± 0,018
desintegrazio erradioaktiboisotopo egonkor
Semidesintegrazio-periodoNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
aurkikuntza-data1923
parity+

53Cr

masa-zenbaki53
neutron number29
atomo-masa erlatibo
52,940646304 ± 0,000000124 Da
g-factor
natural abundance
9,501 ± 0,017
desintegrazio erradioaktiboisotopo egonkor
Semidesintegrazio-periodoNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
−0,15 ± 0,05
aurkikuntza-data1930
parity-

54Cr

masa-zenbaki54
neutron number30
atomo-masa erlatibo
53,938877359 ± 0,000000142 Da
g-factor
0
natural abundance
2,365 ± 0,007
desintegrazio erradioaktiboisotopo egonkor
Semidesintegrazio-periodoNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
aurkikuntza-data1930
parity+

55Cr

masa-zenbaki55
neutron number31
atomo-masa erlatibo
54,940836637 ± 0,000000245 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
3,497 ± 0,003 m
spin3/2
nuclear quadrupole moment
aurkikuntza-data1952
parity-

decay modeintensity
β (β decay)100%

56Cr

masa-zenbaki56
neutron number32
atomo-masa erlatibo
55,940648977 ± 0,00000062 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
5,94 ± 0,1 m
spin0
nuclear quadrupole moment
0
aurkikuntza-data1960
parity+

decay modeintensity
β (β decay)100%

57Cr

masa-zenbaki57
neutron number33
atomo-masa erlatibo
56,943612112 ± 0,000002 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
21,1 ± 1 s
spin3/2
nuclear quadrupole moment
aurkikuntza-data1978
parity

decay modeintensity
β (β decay)100%

58Cr

masa-zenbaki58
neutron number34
atomo-masa erlatibo
57,944184501 ± 0,0000032 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
7 ± 0,3 s
spin0
nuclear quadrupole moment
0
aurkikuntza-data1980
parity+

decay modeintensity
β (β decay)100%

59Cr

masa-zenbaki59
neutron number35
atomo-masa erlatibo
58,948345426 ± 0,00000072 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
1.050 ± 90 ms
spin1/2
nuclear quadrupole moment
0
aurkikuntza-data1980
parity-

decay modeintensity
β (β decay)100%

60Cr

masa-zenbaki60
neutron number36
atomo-masa erlatibo
59,949641656 ± 0,0000012 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
490 ± 10 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1980
parity+

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

61Cr

masa-zenbaki61
neutron number37
atomo-masa erlatibo
60,95437813 ± 0,000002 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
243 ± 9 ms
spin5/2
nuclear quadrupole moment
aurkikuntza-data1985
parity-

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

62Cr

masa-zenbaki62
neutron number38
atomo-masa erlatibo
61,95614292 ± 0,0000037 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
206 ± 12 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1985
parity+

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

63Cr

masa-zenbaki63
neutron number39
atomo-masa erlatibo
62,961161 ± 0,000078 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
129 ± 2 ms
spin1/2
nuclear quadrupole moment
0
aurkikuntza-data1992
parity-

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

64Cr

masa-zenbaki64
neutron number40
atomo-masa erlatibo
63,963886 ± 0,000322 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
43 ± 1 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1992
parity+

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

65Cr

masa-zenbaki65
neutron number41
atomo-masa erlatibo
64,969608 ± 0,000215 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
27,5 ± 2,1 ms
spin1/2
nuclear quadrupole moment
0
aurkikuntza-data1997
parity-

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

66Cr

masa-zenbaki66
neutron number42
atomo-masa erlatibo
65,973011 ± 0,000322 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
23,8 ± 1,8 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1997
parity+

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

67Cr

masa-zenbaki67
neutron number43
atomo-masa erlatibo
66,979313 ± 0,000429 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
spin1/2
nuclear quadrupole moment
0
aurkikuntza-data1997
parity-

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

68Cr

masa-zenbaki68
neutron number44
atomo-masa erlatibo
67,983156 ± 0,000537 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
spin0
nuclear quadrupole moment
0
aurkikuntza-data2009
parity+

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

69Cr

masa-zenbaki69
neutron number45
atomo-masa erlatibo
68,989662 ± 0,000537 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
spin7/2
nuclear quadrupole moment
aurkikuntza-data2013
parity+

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

70Cr

masa-zenbaki70
neutron number46
atomo-masa erlatibo
69,993945 ± 0,000644 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
spin0
nuclear quadrupole moment
0
aurkikuntza-data2013
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Chromium crystals and 1cm3 cube

historia

aurkitzailea edo asmatzaileaLouis Vauquelin
aurkikuntzaren lekuaFrance
aurkikuntza-data1797
etimologiaGreek: chrôma (color).
pronunciationKROH-mi-em (ingelesa)

source

Abundance
Abundance in Earth's crust
102 mg/kg
natural abundance (ozeano)
0,0003 mg/L
natural abundance (gizakiaren gorputza)
0,000003 %
natural abundance (Meteoroide)
0,3 %
natural abundance (Eguzkia)
0,002 %
Abundance in Universe
0,0015 %

Nuclear Screening Constants

1s0.5862
2p3.9248
2s7.0162
3d14.2434
3p12.534
3s11.6322
4s18.8668