Chrom

Chrom (Cr)

chemical element with symbol Cr and atomic number 24
Atomic Number24
Atomic Weight51.9961
mass number52
Group6
Period4
Blockd
Proton24 p+
Neutron28 n0
Elektron24 e-
Animated Bohr model of Cr (Chrom)

Physikalesch Eegenschaft

Atomic Radius
molar volume
Covalent Radius
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
density
Atomic Radii Of The Elements: Chrom0102030405060708090100110120130140150160170180190200210pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energie
proton affinity
electron affinity
ionization energy
ionization energy of Cr (Chrom)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Elektron
electron shell2, 8, 13, 1
Bohr model: Cr (Chrom)
valence electron1
Lewis structure: Cr (Chrom)
electron configuration[Ar] 3d5 4s1
1s2 2s2 2p6 3s2 3p6 3d5 4s1
Enhanced Bohr model of Cr (Chrom)
Orbital Diagram of Cr (Chrom)
oxidation number-4, -2, -1, 0, 1, 2, 3, 4, 5, 6
electronegativity
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
Faarf
Silver
appearancesilvery metallic
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
electrical resistivity
superconductivity
Magnetismus
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
Struktur
Crystal StructureBody Centered Cubic (BCC)
lattice constant
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
0,21
speed of sound
classification
CategoryTransition metals, Transition metals
CAS GroupVIA
IUPAC GroupVIB
Glawe Number55
Mendeleev Number51
Pettifor Number57
Geochemical Classfirst series transition metal
Goldschmidt classificationlitophile

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
Radioaktivitéit☢️ radioactive element
half-life
spin3/2
nuclear quadrupole moment
Datum vun der Entdeckung
parity+

decay modeintensity
p (proton emission)

42Cr

mass number42
neutron number18
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
13,3 ± 1 ms
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1996
parity+

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
21,1 ± 0,3 ms
spin3/2
nuclear quadrupole moment
Datum vun der Entdeckung1992
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

mass number44
neutron number20
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
42,8 ± 0,6 ms
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1987
parity+

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
60,9 ± 0,4 ms
spin7/2
nuclear quadrupole moment
Datum vun der Entdeckung1974
parity-

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
224,3 ± 1,3 ms
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1972
parity+

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

47Cr

mass number47
neutron number23
Relative Atomic Mass
g-factor
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
461,6 ± 1,5 ms
spin3/2
nuclear quadrupole moment
Datum vun der Entdeckung1972
parity-

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

48Cr

mass number48
neutron number24
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
21,56 ± 0,03 h
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1952
parity+

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

49Cr

mass number49
neutron number25
Relative Atomic Mass
g-factor
0,1904 ± 0,0012
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
42,3 ± 0,1 m
spin5/2
nuclear quadrupole moment
Datum vun der Entdeckung1942
parity-

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

50Cr

mass number50
neutron number26
Relative Atomic Mass
g-factor
0
natural abundance
4,345 ± 0,013
Radioaktivitéit☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1930
parity+

decay modeintensity
+ (double β+ decay)

51Cr

mass number51
neutron number27
Relative Atomic Mass
g-factor
0,26685714285714 ± 0,0014285714285714
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
27,7015 ± 0,0011 d
spin7/2
nuclear quadrupole moment
Datum vun der Entdeckung1940
parity-

decay modeintensity
ϵ (electron capture)100%

52Cr

mass number52
neutron number28
Relative Atomic Mass
g-factor
0
natural abundance
83,789 ± 0,018
Radioaktivitéitstable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1923
parity+

53Cr

mass number53
neutron number29
Relative Atomic Mass
g-factor
natural abundance
9,501 ± 0,017
Radioaktivitéitstable isotope
half-lifeNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
-0,15 ± 0,05
Datum vun der Entdeckung1930
parity-

54Cr

mass number54
neutron number30
Relative Atomic Mass
g-factor
0
natural abundance
2,365 ± 0,007
Radioaktivitéitstable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1930
parity+

55Cr

mass number55
neutron number31
Relative Atomic Mass
g-factor
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
3,497 ± 0,003 m
spin3/2
nuclear quadrupole moment
Datum vun der Entdeckung1952
parity-

decay modeintensity
β (β decay)100%

56Cr

mass number56
neutron number32
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
5,94 ± 0,1 m
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1960
parity+

decay modeintensity
β (β decay)100%

57Cr

mass number57
neutron number33
Relative Atomic Mass
g-factor
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
21,1 ± 1 s
spin3/2
nuclear quadrupole moment
Datum vun der Entdeckung1978
parity

decay modeintensity
β (β decay)100%

58Cr

mass number58
neutron number34
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
7 ± 0,3 s
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1980
parity+

decay modeintensity
β (β decay)100%

59Cr

mass number59
neutron number35
Relative Atomic Mass
g-factor
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
1.050 ± 90 ms
spin1/2
nuclear quadrupole moment
0
Datum vun der Entdeckung1980
parity-

decay modeintensity
β (β decay)100%

60Cr

mass number60
neutron number36
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
490 ± 10 ms
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1980
parity+

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

61Cr

mass number61
neutron number37
Relative Atomic Mass
g-factor
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
243 ± 9 ms
spin5/2
nuclear quadrupole moment
Datum vun der Entdeckung1985
parity-

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

62Cr

mass number62
neutron number38
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
206 ± 12 ms
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1985
parity+

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

63Cr

mass number63
neutron number39
Relative Atomic Mass
g-factor
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
129 ± 2 ms
spin1/2
nuclear quadrupole moment
0
Datum vun der Entdeckung1992
parity-

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

64Cr

mass number64
neutron number40
Relative Atomic Mass
g-factor
0
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
43 ± 1 ms
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1992
parity+

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

65Cr

mass number65
neutron number41
Relative Atomic Mass
g-factor
natural abundance
Radioaktivitéit☢️ radioactive element
half-life
27,5 ± 2,1 ms
spin1/2
nuclear quadrupole moment
0
Datum vun der Entdeckung1997
parity-

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
23,8 ± 1,8 ms
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung1997
parity+

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
Datum vun der Entdeckung1997
parity-

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung2009
parity+

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
spin7/2
nuclear quadrupole moment
Datum vun der Entdeckung2013
parity+

decay modeintensity
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
Radioaktivitéit☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
Datum vun der Entdeckung2013
parity+

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

Geschicht

Entdecker oder ErfinderLouis Vauquelin
location of discoveryFrance
Datum vun der Entdeckung1797
EtymologieGreek: chrôma (color).
pronunciationKROH-mi-em (Englesch)

Quell

Abundance
Abundance in Earth's crust
natural abundance (Ozean)
natural abundance (Mënschleche Kierper)
0,000003 %
natural abundance (Meteoroid)
0,3 %
natural abundance (Sonn)
0,002 %
Abundance in Universe
0,0015 %

Nuclear Screening Constants

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