Cromo

Cromo (Cr)

chemical element with symbol Cr and atomic number 24
Atomic Number24
Atomic Weight51.9961
Numero masico52
Group6
Period4
Blockd
Protón24 p+
Neutrón28 n0
Electrón24 e-
Animated Modelo atomico de Bohr of Cr (Cromo)

Physical Property

Radio Atomico
molar volume
Radio covalent
Metallic Radius
Radio ionico
Crystal Radius
Radio de van der Waals
density
Atomic Radii Of The Elements: Cromo0102030405060708090100110120130140150160170180190200210pmRadio AtomicoRadio CovalentMetallic RadiusRadio de van der Waals

Chemical Property

enerchía
proton affinity
Afinidat electronica
ionization energy
ionization energy of Cr (Cromo)
Entalpía de vaporización
entalpía de fusión
standard enthalpy of formation
Electrón
electron shell2, 8, 13, 1
Modelo atomico de Bohr: Cr (Cromo)
valence electron1
Lewis structure: Cr (Cromo)
electron configuration[Ar] 3d5 4s1
1s2 2s2 2p6 3s2 3p6 3d5 4s1
Enhanced Modelo atomico de Bohr of Cr (Cromo)
Orbital Diagram of Cr (Cromo)
Numero d'oxidación-4, -2, -1, 0, 1, 2, 3, 4, 5, 6
Electronegatividat
1.66
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
Punto triple
appearance
Color
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
magnetism
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
structure
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

Numero masico41
neutron number17
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin3/2
nuclear quadrupole moment
time of discovery or invention
parity+

decay modeintensity
p (proton emission)

42Cr

Numero masico42
neutron number18
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
13.3 ± 1 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1996
parity+

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

43Cr

Numero masico43
neutron number19
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
21.1 ± 0.3 ms
spin3/2
nuclear quadrupole moment
time of discovery or invention1992
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

Numero masico44
neutron number20
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
42.8 ± 0.6 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1987
parity+

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

45Cr

Numero masico45
neutron number21
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
60.9 ± 0.4 ms
spin7/2
nuclear quadrupole moment
time of discovery or invention1974
parity-

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

46Cr

Numero masico46
neutron number22
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
224.3 ± 1.3 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1972
parity+

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

47Cr

Numero masico47
neutron number23
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
461.6 ± 1.5 ms
spin3/2
nuclear quadrupole moment
time of discovery or invention1972
parity-

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

48Cr

Numero masico48
neutron number24
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
21.56 ± 0.03 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1952
parity+

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

49Cr

Numero masico49
neutron number25
Relative Atomic Mass
g-factor
0.1904 ± 0.0012
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
42.3 ± 0.1 m
spin5/2
nuclear quadrupole moment
time of discovery or invention1942
parity-

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

50Cr

Numero masico50
neutron number26
Relative Atomic Mass
g-factor
0
natural abundance
4.345 ± 0.013
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin0
nuclear quadrupole moment
0
time of discovery or invention1930
parity+

decay modeintensity
+ (double β+ decay)

51Cr

Numero masico51
neutron number27
Relative Atomic Mass
g-factor
0.26685714285714 ± 0.0014285714285714
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
27.7015 ± 0.0011 d
spin7/2
nuclear quadrupole moment
time of discovery or invention1940
parity-

decay modeintensity
ϵ (electron capture)100%

52Cr

Numero masico52
neutron number28
Relative Atomic Mass
g-factor
0
natural abundance
83.789 ± 0.018
Radioactividatstable isotope
Periodo de semidesintegraciónNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1923
parity+

53Cr

Numero masico53
neutron number29
Relative Atomic Mass
g-factor
natural abundance
9.501 ± 0.017
Radioactividatstable isotope
Periodo de semidesintegraciónNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
-0.15 ± 0.05
time of discovery or invention1930
parity-

54Cr

Numero masico54
neutron number30
Relative Atomic Mass
g-factor
0
natural abundance
2.365 ± 0.007
Radioactividatstable isotope
Periodo de semidesintegraciónNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1930
parity+

55Cr

Numero masico55
neutron number31
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
3.497 ± 0.003 m
spin3/2
nuclear quadrupole moment
time of discovery or invention1952
parity-

decay modeintensity
β (β decay)100%

56Cr

Numero masico56
neutron number32
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
5.94 ± 0.1 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1960
parity+

decay modeintensity
β (β decay)100%

57Cr

Numero masico57
neutron number33
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
21.1 ± 1 s
spin3/2
nuclear quadrupole moment
time of discovery or invention1978
parity

decay modeintensity
β (β decay)100%

58Cr

Numero masico58
neutron number34
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
7 ± 0.3 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1980
parity+

decay modeintensity
β (β decay)100%

59Cr

Numero masico59
neutron number35
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
1050 ± 90 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1980
parity-

decay modeintensity
β (β decay)100%

60Cr

Numero masico60
neutron number36
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
490 ± 10 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1980
parity+

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

61Cr

Numero masico61
neutron number37
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
243 ± 9 ms
spin5/2
nuclear quadrupole moment
time of discovery or invention1985
parity-

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

62Cr

Numero masico62
neutron number38
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
206 ± 12 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1985
parity+

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

63Cr

Numero masico63
neutron number39
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
129 ± 2 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1992
parity-

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

64Cr

Numero masico64
neutron number40
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
43 ± 1 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1992
parity+

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

65Cr

Numero masico65
neutron number41
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
27.5 ± 2.1 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1997
parity-

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

66Cr

Numero masico66
neutron number42
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
23.8 ± 1.8 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention1997
parity+

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

67Cr

Numero masico67
neutron number43
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1997
parity-

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

68Cr

Numero masico68
neutron number44
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin0
nuclear quadrupole moment
0
time of discovery or invention2009
parity+

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

69Cr

Numero masico69
neutron number45
Relative Atomic Mass
g-factor
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin7/2
nuclear quadrupole moment
time of discovery or invention2013
parity+

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

70Cr

Numero masico70
neutron number46
Relative Atomic Mass
g-factor
0
natural abundance
Radioactividat☢️ radioactive element
Periodo de semidesintegración
spin0
nuclear quadrupole moment
0
time of discovery or invention2013
parity+

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

historia

discoverer or inventorLouis Vauquelin
location of discoveryFrance
time of discovery or invention1797
EtimolochíaGreek: chrôma (color).
pronunciationKROH-mi-em (English)

source

Abundance
Abundance in Earth's crust
natural abundance (ocián)
natural abundance (human body)
0.000003 %
natural abundance (meteoroid)
0.3 %
natural abundance (Sol)
0.002 %
Abundance in Universe
0.0015 %

Nuclear Screening Constants

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