Krom

Krom (Cr)

chemical element with symbol Cr and atomic number 24
Atomic Number24
Atomic Weight51.9961
Niver mas52
Group6
Period4
Blockd
Proton24 p+
Neutron28 n0
Elektron24 e-
Animated Bohr model of Cr (Krom)

Physical Property

Atomic Radius
molar volume
Covalent Radius
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
density
Atomic Radii Of The Elements: Krom0102030405060708090100110120130140150160170180190200210pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energiezh
proton affinity
electron affinity
ionization energy
ionization energy of Cr (Krom)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Elektron
electron shell2, 8, 13, 1
Bohr model: Cr (Krom)
valence electron1
Lewis structure: Cr (Krom)
electron configuration[Ar] 3d5 4s1
1s2 2s2 2p6 3s2 3p6 3d5 4s1
Enhanced Bohr model of Cr (Krom)
Orbital Diagram of Cr (Krom)
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
Poent tric'hement
appearance
liv
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
Gwarellegezh
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
framm
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
rummatadur
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

Niver mas41
niver a neutron17
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin3/2
nuclear quadrupole moment
time of discovery or invention
parity+

decay modeintensity
p (proton emission)

42Cr

Niver mas42
niver a neutron18
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas43
niver a neutron19
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas44
niver a neutron20
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas45
niver a neutron21
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas46
niver a neutron22
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas47
niver a neutron23
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas48
niver a neutron24
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas49
niver a neutron25
Relative Atomic Mass
g-factor
0,1904 ± 0,0012
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas50
niver a neutron26
Relative Atomic Mass
g-factor
0
natural abundance
4,345 ± 0,013
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1930
parity+

decay modeintensity
+ (double β+ decay)

51Cr

Niver mas51
niver a neutron27
Relative Atomic Mass
g-factor
0,26685714285714 ± 0,0014285714285714
natural abundance
radioactivity☢️ radioactive element
half-life
27,7015 ± 0,0011 d
spin7/2
nuclear quadrupole moment
time of discovery or invention1940
parity-

decay modeintensity
ϵ (electron capture)100%

52Cr

Niver mas52
niver a neutron28
Relative Atomic Mass
g-factor
0
natural abundance
83,789 ± 0,018
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1923
parity+

53Cr

Niver mas53
niver a neutron29
Relative Atomic Mass
g-factor
natural abundance
9,501 ± 0,017
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
-0,15 ± 0,05
time of discovery or invention1930
parity-

54Cr

Niver mas54
niver a neutron30
Relative Atomic Mass
g-factor
0
natural abundance
2,365 ± 0,007
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1930
parity+

55Cr

Niver mas55
niver a neutron31
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3,497 ± 0,003 m
spin3/2
nuclear quadrupole moment
time of discovery or invention1952
parity-

decay modeintensity
β (β decay)100%

56Cr

Niver mas56
niver a neutron32
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
5,94 ± 0,1 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1960
parity+

decay modeintensity
β (β decay)100%

57Cr

Niver mas57
niver a neutron33
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
21,1 ± 1 s
spin3/2
nuclear quadrupole moment
time of discovery or invention1978
parity

decay modeintensity
β (β decay)100%

58Cr

Niver mas58
niver a neutron34
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
7 ± 0,3 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1980
parity+

decay modeintensity
β (β decay)100%

59Cr

Niver mas59
niver a neutron35
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1 050 ± 90 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1980
parity-

decay modeintensity
β (β decay)100%

60Cr

Niver mas60
niver a neutron36
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas61
niver a neutron37
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas62
niver a neutron38
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas63
niver a neutron39
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas64
niver a neutron40
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas65
niver a neutron41
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas66
niver a neutron42
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas67
niver a neutron43
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas68
niver a neutron44
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas69
niver a neutron45
Relative Atomic Mass
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
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

Niver mas70
niver a neutron46
Relative Atomic Mass
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
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

istor

dizoloer pe ijinerLouis Vauquelin
location of discoveryFrance
time of discovery or invention1797
EtimologiezhGreek: chrôma (color).
pronunciationKROH-mi-em (saozneg)

mammenn

Abundance
Abundance in Earth's crust
natural abundance (meurvor)
natural abundance (human body)
0,000003 %
natural abundance (meteoroid)
0,3 %
natural abundance (Heol)
0,002 %
Abundance in Universe
0,0015 %

Nuclear Screening Constants

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