Fèrre

Fèrre (Fe)

chemical element with symbol Fe and atomic number 26
Atomic Number26
Atomic Weight55.845
mass number56
Group8
Period4
Blockd
proton26 p+
neutron30 n0
electron26 e-
Animated Bohr model of Fe (Fèrre)

Proprietat Fisica

Rai Atomic
140 pm
molar volume
covalent radius
116 pm
Metallic Radius
117 pm
ionic radius
63 pm
Crystal Radius
77 pm
Rai de van der Waals
204 pm
densitat
7.87 g/cm³
Atomic Radii Of The Elements: Fèrre0153045607590105120135150165180195210pmRai AtomicCovalent RadiusMetallic RadiusRai de van der Waals

Chemical Property

energia
proton affinity
754 kJ/mol
electron affinity
ionization energy
7.9024678 eV/particle
ionization energy of Fe (Fèrre)
enthalpy of vaporization
340 kJ/mol
enthalpy of fusion
13.8 kJ/mol
standard enthalpy of formation
415.5 kJ/mol
electron
electron shell2, 8, 14, 2
Bohr model: Fe (Fèrre)
valence electron2
Lewis structure: Fe (Fèrre)
electron configuration[Ar] 3d6 4s2
1s2 2s2 2p6 3s2 3p6 3d6 4s2
Enhanced Bohr model of Fe (Fèrre)
Orbital Diagram of Fe (Fèrre)
oxidation number-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7
Electronegativitat
1.83
Electrophilicity Index
1.045904228706801 eV/particle
fundamental state of matter
estat de la matèriaSolid
gaseous state of matter
Boiling Point
3134.15 K
Melting Point
1811.15 K
critical pressure
critical temperature
9340.15 K
Ponch triple
appearance
Color
Gray
appearancelustrous metallic with a grayish tinge
Indici de refraccion
thermodynamic material property
Thermal Conductivity
80.4 W/(m K)
thermal expansion
0.0000118 1/K
molar heat capacity
Specific Heat Capacity
0.449 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
10 MS/m
electrical resistivity
0.00000009700000000001 m Ω
superconductivity
magnetism
typeferromagnetic
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
1043 K
Néel temperature
estructura
Crystal StructureBody Centered Cubic (BCC)
lattice constant
2.87 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
Duretat
4 MPa
bulk modulus
170 GPa
shear modulus
82 GPa
Young's modulus
211 GPa
Poisson's ratio
0.29
speed of sound
4910 m/s
classification
CategoryTransition metals, Transition metals
CAS GroupVIIIA
IUPAC GroupVIII
Glawe Number71
Mendeleev Number59
Pettifor Number61
Geochemical Classmajor
Goldschmidt classificationsiderophile

other

Gas Basicity
731.1 kJ/mol
polarizability
62 ± 4 a₀
C6 Dispersion Coefficient
482 a₀
allotrope
Neutron cross section
2.56
Neutron Mass Absorption
0.0015
quantum number5D4
space group229 (Im_3m)

Isotopes of Iron

Stable Isotopes3
Unstable Isotopes29
Natural Isotopes4
Isotopic Composition5691.75%5691.75%545.85%545.85%572.12%572.12%580.28%580.28%

45Fe

mass number45
neutron number19
relative atomic mass
45.015467 ± 0.000304 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
2.5 ± 0.2 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1996
parity+

decay modeintensity
2p (2-proton emission)70%
β+ (β+ decay; β+ = ϵ + e+)30%
β+ p (β+-delayed proton emission)18.9%
2p (2-proton emission)7.8%

46Fe

mass number46
neutron number20
relative atomic mass
46.001299 ± 0.000322 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
13 ± 2 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1992
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)78.7%
2p (2-proton emission)

47Fe

mass number47
neutron number21
relative atomic mass
46.992346 ± 0.000537 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
21.9 ± 0.2 ms
Espin7/2
nuclear quadrupole moment
data de descobèrta1992
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)88.4%

48Fe

mass number48
neutron number22
relative atomic mass
47.980667 ± 0.000099 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
45.3 ± 0.6 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1987
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)15.3%

49Fe

mass number49
neutron number23
relative atomic mass
48.973429 ± 0.000026 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
64.7 ± 0.3 ms
Espin7/2
nuclear quadrupole moment
data de descobèrta1970
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)56.7%

50Fe

mass number50
neutron number24
relative atomic mass
49.962988 ± 0.000009 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
152 ± 0.6 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1977
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0%

51Fe

mass number51
neutron number25
relative atomic mass
50.956855137 ± 0.000001501 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
305.4 ± 2.3 ms
Espin5/2
nuclear quadrupole moment
data de descobèrta1972
parity-

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

52Fe

mass number52
neutron number26
relative atomic mass
51.948113364 ± 0.000000192 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
8.275 ± 0.008 h
Espin0
nuclear quadrupole moment
0
data de descobèrta1948
parity+

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

53Fe

mass number53
neutron number27
relative atomic mass
52.945305629 ± 0.000001792 Da
g-factor
-0.18571428571429 ± 0.0028571428571429
natural abundance
Radioactivitat☢️ radioactive element
Semivida
8.51 ± 0.02 m
Espin7/2
nuclear quadrupole moment
data de descobèrta1938
parity-

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

54Fe

mass number54
neutron number28
relative atomic mass
53.939608189 ± 0.000000368 Da
g-factor
0
natural abundance
5.845 ± 0.105
Radioactivitat☢️ radioactive element
Semivida
Espin0
nuclear quadrupole moment
0
data de descobèrta1923
parity+

decay modeintensity
+ (double β+ decay)

55Fe

mass number55
neutron number29
relative atomic mass
54.938291158 ± 0.00000033 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
2.7562 ± 0.0004 y
Espin3/2
nuclear quadrupole moment
data de descobèrta1939
parity-

decay modeintensity
ϵ (electron capture)100%

56Fe

mass number56
neutron number30
relative atomic mass
55.934935537 ± 0.000000287 Da
g-factor
0
natural abundance
91.754 ± 0.106
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin0
nuclear quadrupole moment
0
data de descobèrta1923
parity+

57Fe

mass number57
neutron number31
relative atomic mass
56.93539195 ± 0.000000287 Da
g-factor
natural abundance
2.119 ± 0.029
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1935
parity-

58Fe

mass number58
neutron number32
relative atomic mass
57.933273575 ± 0.000000339 Da
g-factor
0
natural abundance
0.282 ± 0.012
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin0
nuclear quadrupole moment
0
data de descobèrta1935
parity+

59Fe

mass number59
neutron number33
relative atomic mass
58.934873492 ± 0.000000354 Da
g-factor
-0.22386666666667 ± 0.00026666666666667
natural abundance
Radioactivitat☢️ radioactive element
Semivida
44.5 ± 0.012 d
Espin3/2
nuclear quadrupole moment
data de descobèrta1938
parity-

decay modeintensity
β (β decay)100%

60Fe

mass number60
neutron number34
relative atomic mass
59.934070249 ± 0.000003656 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
2.62 ± 0.04 My
Espin0
nuclear quadrupole moment
0
data de descobèrta1957
parity+

decay modeintensity
β (β decay)100%

61Fe

mass number61
neutron number35
relative atomic mass
60.936746241 ± 0.0000028 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
5.98 ± 0.06 m
Espin3/2
nuclear quadrupole moment
data de descobèrta1957
parity-

decay modeintensity
β (β decay)100%

62Fe

mass number62
neutron number36
relative atomic mass
61.936791809 ± 0.000003 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
68 ± 2 s
Espin0
nuclear quadrupole moment
0
data de descobèrta1975
parity+

decay modeintensity
β (β decay)100%

63Fe

mass number63
neutron number37
relative atomic mass
62.940272698 ± 0.000004618 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
6.1 ± 0.6 s
Espin5/2
nuclear quadrupole moment
data de descobèrta1980
parity-

decay modeintensity
β (β decay)100%

64Fe

mass number64
neutron number38
relative atomic mass
63.940987761 ± 0.000005386 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
2 ± 0.2 s
Espin0
nuclear quadrupole moment
0
data de descobèrta1980
parity+

decay modeintensity
β (β decay)100%

65Fe

mass number65
neutron number39
relative atomic mass
64.945015323 ± 0.000005487 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
805 ± 10 ms
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1980
parity-

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

66Fe

mass number66
neutron number40
relative atomic mass
65.946249958 ± 0.0000044 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
467 ± 29 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1985
parity+

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

67Fe

mass number67
neutron number41
relative atomic mass
66.95093 ± 0.0000041 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
394 ± 9 ms
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1985
parity-

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

68Fe

mass number68
neutron number42
relative atomic mass
67.952875 ± 0.000207 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
188 ± 4 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1985
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0%

69Fe

mass number69
neutron number43
relative atomic mass
68.957918 ± 0.000215 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
162 ± 7 ms
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1992
parity-

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

70Fe

mass number70
neutron number44
relative atomic mass
69.960397 ± 0.000322 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
61.4 ± 0.7 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1997
parity+

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

71Fe

mass number71
neutron number45
relative atomic mass
70.965722 ± 0.000429 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
34.3 ± 2.6 ms
Espin7/2
nuclear quadrupole moment
data de descobèrta1997
parity+

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

72Fe

mass number72
neutron number46
relative atomic mass
71.968599 ± 0.000537 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
17 ± 1 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta1997
parity+

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

73Fe

mass number73
neutron number47
relative atomic mass
72.974246 ± 0.000537 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
12.9 ± 1.6 ms
Espin7/2
nuclear quadrupole moment
data de descobèrta2010
parity+

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

74Fe

mass number74
neutron number48
relative atomic mass
73.977821 ± 0.000537 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
5 ± 5 ms
Espin0
nuclear quadrupole moment
0
data de descobèrta2010
parity+

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

75Fe

mass number75
neutron number49
relative atomic mass
74.984219 ± 0.000644 Da
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin9/2
nuclear quadrupole moment
data de descobèrta2013
parity+

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

76Fe

mass number76
neutron number50
relative atomic mass
75.988631 ± 0.000644 Da
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin0
nuclear quadrupole moment
0
data de descobèrta2017
parity+

decay modeintensity
β (β decay)
Iron electrolytic and 1cm3 cube

istòria

descobridor o inventaireKnown to the ancients.
luòc de descobèrta
data de descobèrta
EtimologiaAnglo-Saxon: iron; symbol from Latin: ferrum (iron).
pronunciationEYE-ern (English)

source

Abundance
Abundance in Earth's crust
56300 mg/kg
natural abundance (Ocean)
0.002 mg/L
natural abundance (còs uman)
0.006 %
natural abundance (meteoroid)
22 %
natural abundance (Solelh)
0.1 %
Abundance in Universe
0.11 %

Nuclear Screening Constants

1s0.619
2p3.9112
2s7.401
3d14.8202
3p13.2221
3s12.3239
4s20.566