Chromas

Chromas (Cr)

chemical element with symbol Cr and atomic number 24
Atomic Number24
Atomic Weight51.9961
mass number52
Group6
Period4
Blockd
protonas24 p+
neutronas28 n0
elektronas24 e-
Animated Boro teorija of Cr (Chromas)

Fizikinė Ypatybė

Atomo Spindulys
molinis tūris
Kovalentinis spindulys
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
tankis
Atomic Radii Of The Elements: Chromas0102030405060708090100110120130140150160170180190200210pmAtomo SpindulysKovalentinis SpindulysMetallic RadiusVan der Waals radius

Chemical Property

energija
proton affinity
electron affinity
ionization energy
ionization energy of Cr (Chromas)
Garavimo šiluma
lydymosi šiluma
standard enthalpy of formation
elektronas
electron shell2, 8, 13, 1
Boro teorija: Cr (Chromas)
Valentinis elektronas1
Lewis structure: Cr (Chromas)
elektronų konfigūracija[Ar] 3d5 4s1
1s2 2s2 2p6 3s2 3p6 3d5 4s1
Enhanced Boro teorija of Cr (Chromas)
Orbital Diagram of Cr (Chromas)
oksidacijos laipsnis-4, -2, -1, 0, 1, 2, 3, 4, 5, 6
Elektroneigiamumas
1.66
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
triple point
appearance
spalva
Silver
appearancesilvery metallic
lūžio rodiklis
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
Elektrinis laidumas
electrical resistivity
Superlaidumas
Magnetizmas
typeantiferromagnetic
magnetic susceptibility (Mass)
0,0000000445 m³/Kg
magnetic susceptibility (Molar)
0,000000002314 m³/mol
magnetic susceptibility (Volume)
0,0003177
magnetic ordering
Curie temperature
Néel temperature
struktūra
Crystal StructureBody Centered Cubic (BCC)
Gardelės konstanta
Lattice Anglesπ/2, π/2, π/2
mechanical property
kietis
bulk modulus
shear modulus
Jungo modulis
Puasono santykis
0,21
garso greitis
classification
CategoryTransition metals, Transition metals
CAS GroupVIA
IUPAC GroupVIB
Glawe Number55
Mendeleev Number51
Pettifor Number57
Geochemical Classfirst series transition metal
Goldšmito klasifikacijalitophile

other

Gas Basicity
polarizability
C6 Dispersion Coefficient
allotrope
Neutron cross section
3,1
Neutron Mass Absorption
0,0021
quantum number7S3
space group229 (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

mass number41
neutron number17
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
Sukinys3/2
nuclear quadrupole moment
atradimo data
parity+

decay modeIntensyvumas
p (proton emission)

42Cr

mass number42
neutron number18
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
13,3 ± 1 ms
Sukinys0
nuclear quadrupole moment
0
atradimo data1996
parity+

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

43Cr

mass number43
neutron number19
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
21,1 ± 0,3 ms
Sukinys3/2
nuclear quadrupole moment
atradimo data1992
parity+

decay modeIntensyvumas
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

mass number44
neutron number20
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
42,8 ± 0,6 ms
Sukinys0
nuclear quadrupole moment
0
atradimo data1987
parity+

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

45Cr

mass number45
neutron number21
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
60,9 ± 0,4 ms
Sukinys7/2
nuclear quadrupole moment
atradimo data1974
parity-

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

46Cr

mass number46
neutron number22
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
224,3 ± 1,3 ms
Sukinys0
nuclear quadrupole moment
0
atradimo data1972
parity+

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

47Cr

mass number47
neutron number23
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
461,6 ± 1,5 ms
Sukinys3/2
nuclear quadrupole moment
atradimo data1972
parity-

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

48Cr

mass number48
neutron number24
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
21,56 ± 0,03 h
Sukinys0
nuclear quadrupole moment
0
atradimo data1952
parity+

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

49Cr

mass number49
neutron number25
Relative Atomic Mass
g-factor
0,1904 ± 0,0012
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
42,3 ± 0,1 m
Sukinys5/2
nuclear quadrupole moment
atradimo data1942
parity-

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

50Cr

mass number50
neutron number26
Relative Atomic Mass
g-factor
0
natural abundance
4,345 ± 0,013
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
Sukinys0
nuclear quadrupole moment
0
atradimo data1930
parity+

decay modeIntensyvumas
+ (double β+ decay)

51Cr

mass number51
neutron number27
Relative Atomic Mass
g-factor
0,26685714285714 ± 0,0014285714285714
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
27,7015 ± 0,0011 d
Sukinys7/2
nuclear quadrupole moment
atradimo data1940
parity-

decay modeIntensyvumas
ϵ (electron capture)100%

52Cr

mass number52
neutron number28
Relative Atomic Mass
g-factor
0
natural abundance
83,789 ± 0,018
Radioaktyvumasstable isotope
pusėjimo trukmėNot Radioactive ☢️
Sukinys0
nuclear quadrupole moment
0
atradimo data1923
parity+

53Cr

mass number53
neutron number29
Relative Atomic Mass
g-factor
natural abundance
9,501 ± 0,017
Radioaktyvumasstable isotope
pusėjimo trukmėNot Radioactive ☢️
Sukinys3/2
nuclear quadrupole moment
−0,15 ± 0,05
atradimo data1930
parity-

54Cr

mass number54
neutron number30
Relative Atomic Mass
g-factor
0
natural abundance
2,365 ± 0,007
Radioaktyvumasstable isotope
pusėjimo trukmėNot Radioactive ☢️
Sukinys0
nuclear quadrupole moment
0
atradimo data1930
parity+

55Cr

mass number55
neutron number31
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
3,497 ± 0,003 m
Sukinys3/2
nuclear quadrupole moment
atradimo data1952
parity-

decay modeIntensyvumas
β (β decay)100%

56Cr

mass number56
neutron number32
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
5,94 ± 0,1 m
Sukinys0
nuclear quadrupole moment
0
atradimo data1960
parity+

decay modeIntensyvumas
β (β decay)100%

57Cr

mass number57
neutron number33
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
21,1 ± 1 s
Sukinys3/2
nuclear quadrupole moment
atradimo data1978
parity

decay modeIntensyvumas
β (β decay)100%

58Cr

mass number58
neutron number34
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
7 ± 0,3 s
Sukinys0
nuclear quadrupole moment
0
atradimo data1980
parity+

decay modeIntensyvumas
β (β decay)100%

59Cr

mass number59
neutron number35
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
1 050 ± 90 ms
Sukinys1/2
nuclear quadrupole moment
0
atradimo data1980
parity-

decay modeIntensyvumas
β (β decay)100%

60Cr

mass number60
neutron number36
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
490 ± 10 ms
Sukinys0
nuclear quadrupole moment
0
atradimo data1980
parity+

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

61Cr

mass number61
neutron number37
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
243 ± 9 ms
Sukinys5/2
nuclear quadrupole moment
atradimo data1985
parity-

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

62Cr

mass number62
neutron number38
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
206 ± 12 ms
Sukinys0
nuclear quadrupole moment
0
atradimo data1985
parity+

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

63Cr

mass number63
neutron number39
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
129 ± 2 ms
Sukinys1/2
nuclear quadrupole moment
0
atradimo data1992
parity-

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

64Cr

mass number64
neutron number40
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
43 ± 1 ms
Sukinys0
nuclear quadrupole moment
0
atradimo data1992
parity+

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

65Cr

mass number65
neutron number41
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
27,5 ± 2,1 ms
Sukinys1/2
nuclear quadrupole moment
0
atradimo data1997
parity-

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

66Cr

mass number66
neutron number42
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
23,8 ± 1,8 ms
Sukinys0
nuclear quadrupole moment
0
atradimo data1997
parity+

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

67Cr

mass number67
neutron number43
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
Sukinys1/2
nuclear quadrupole moment
0
atradimo data1997
parity-

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

68Cr

mass number68
neutron number44
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
Sukinys0
nuclear quadrupole moment
0
atradimo data2009
parity+

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

69Cr

mass number69
neutron number45
Relative Atomic Mass
g-factor
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
Sukinys7/2
nuclear quadrupole moment
atradimo data2013
parity+

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

70Cr

mass number70
neutron number46
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktyvumas☢️ radioactive element
pusėjimo trukmė
Sukinys0
nuclear quadrupole moment
0
atradimo data2013
parity+

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

istorija

atradėjas arba išradėjasLouis Vauquelin
location of discoveryFrance
atradimo data1797
EtimologijaGreek: chrôma (color).
pronunciationKROH-mi-em (anglų)

source

Abundance
Abundance in Earth's crust
natural abundance (Vandenynas)
natural abundance (Kūnas)
0,000003 %
natural abundance (Meteoroidas)
0,3 %
natural abundance (Saulė)
0,002 %
Abundance in Universe
0,0015 %

Nuclear Screening Constants

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