Besi (Fe)

chemical element with symbol Fe and atomic number 26

Atomic Number	26
Atomic Weight	55.845
Nombor jisim	56

Group	8
Period	4
Block	d

proton	26 p⁺
neutron	30 n⁰
Elektron	26 e^-

Sifat Fizikal

Jejari Atom	140 pm 237 pm
molar volume	7.1 cm³/mol
Jejari kovalen	116 pm 109 pm 102 pm 140 pm 142 pm
Metallic Radius	117 pm 126 pm
ionic radius	63 pm 64 pm 61 pm 78 pm 92 pm 49 pm 58 pm 55 pm 64.5 pm 78 pm 58.5 pm 25 pm
Crystal Radius	77 pm 78 pm 75 pm 92 pm 106 pm 63 pm 72 pm 69 pm 78.5 pm 92 pm 72.5 pm 39 pm
Jejari van der Waals	205 pm 204 pm 223 pm 291.2 pm
ketumpatan	7.87 g/cm³ 6,980 kg/m³

Sifat Kimia

tenaga

proton affinity	754 kJ/mol
Pertalian elektron	0.151 eV/particle
ionization energy	7.9024678 eV/particle 16.1992 eV/particle 30.651 eV/particle 54.91 eV/particle 75 eV/particle 98.985 eV/particle 125 eV/particle 151.06 eV/particle 233.6 eV/particle 262.1 eV/particle 290.9 eV/particle 330.81 eV/particle 361 eV/particle 392.2 eV/particle 456.2 eV/particle 489.312 eV/particle 1,262.7 eV/particle 1,357.8 eV/particle 1,460 eV/particle 1,575.6 eV/particle 1,687 eV/particle 1,798.43 eV/particle 1,950.4 eV/particle 2,045.759 eV/particle 8,828.1875 eV/particle 9,277.681 eV/particle

Entalpi pengewapan	340 kJ/mol
entalpi pelakuran	13.8 kJ/mol
standard enthalpy of formation	415.5 kJ/mol
Elektron

Petala elektron	2, 8, 14, 2

Elektron valens	2 ⓘ

tatarajah elektron	[Ar] 3d⁶ 4s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²

Keadaan pengoksidaan	-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7
Keelektronegatifan	10.64 eV/particle 0.1392532 1.83
Electrophilicity Index	1.045904228706801 eV/particle
keadaan jirim asas

fasa jirim	Solid
gaseous state of matter
Boiling Point	3,134.15 K
Melting Point	1,811.15 K
critical pressure
critical temperature	9,340.15 K
triple point
rupa
warna	Gray #ffa500 #e06633 #e06633
rupa	lustrous metallic with a grayish tinge
indeks biasan
sifat bahan
Thermal Conductivity	80.4 W/(m K)
Pengembangan terma	0.0000118 1/K
molar heat capacity	25.1 J/(mol K)
Specific Heat Capacity	0.449 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
Kekonduksian elektrik	10 MS/m
Kerintangan dan kekonduksian elektrik	0.00000009700000000001 m Ω
Kesuperkonduksian
kemagnetan
type	ferromagnetic
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Suhu Curie	1,043 K
Néel temperature
struktur
Crystal Structure	Body Centered Cubic (BCC)
lattice constant	2.87 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness	490 MPa 4 MPa 608 MPa
Modulus pukal	170 GPa
shear modulus	82 GPa
Young's modulus	211 GPa
Nisbah Poisson	0.29
Kelajuan bunyi	4,910 m/s
pengelasan
Category	Transition metals, Transition metals
CAS Group	VIIIA
IUPAC Group	VIII
Glawe Number	71
Mendeleev Number	59
Pettifor Number	61
Geochemical Class	major
Goldschmidt classification	siderophile

other

Gas Basicity	731.1 kJ/mol
polarizability	62 ± 4 a₀
C6 Dispersion Coefficient	482 a₀ 548 a₀
allotrope
Neutron cross section	2.56
Neutron Mass Absorption	0.0015
Nombor kuantum	5D4
space group	229 (Im_3m)

Isotopes of Iron

Stable Isotopes	3
Unstable Isotopes	29
Natural Isotopes	4

⁴⁵Fe

Nombor jisim	45
nombor neutron	19
jisim atom relatif	45.015467 ± 0.000304 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.5 ± 0.2 ms
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1996
parity	+

decay mode	Keamatan (fizik)
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

Nombor jisim	46
nombor neutron	20
jisim atom relatif	46.001299 ± 0.000322 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	13 ± 2 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1992
parity	+

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

⁴⁷Fe

Nombor jisim	47
nombor neutron	21
jisim atom relatif	46.992346 ± 0.000537 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	21.9 ± 0.2 ms
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1992
parity	-

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

⁴⁸Fe

Nombor jisim	48
nombor neutron	22
jisim atom relatif	47.980667 ± 0.000099 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	45.3 ± 0.6 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1987
parity	+

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

⁴⁹Fe

Nombor jisim	49
nombor neutron	23
jisim atom relatif	48.973429 ± 0.000026 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	64.7 ± 0.3 ms
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

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

⁵⁰Fe

Nombor jisim	50
nombor neutron	24
jisim atom relatif	49.962988 ± 0.000009 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	152 ± 0.6 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1977
parity	+

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

⁵¹Fe

Nombor jisim	51
nombor neutron	25
jisim atom relatif	50.956855137 ± 0.000001501 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	305.4 ± 2.3 ms
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1972
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁵²Fe

Nombor jisim	52
nombor neutron	26
jisim atom relatif	51.948113364 ± 0.000000192 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	8.275 ± 0.008 h
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1948
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁵³Fe

Nombor jisim	53
nombor neutron	27
jisim atom relatif	52.945305629 ± 0.000001792 Da
g-factor	-0.18571428571429 ± 0.0028571428571429
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	8.51 ± 0.02 m
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1938
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁵⁴Fe

Nombor jisim	54
nombor neutron	28
jisim atom relatif	53.939608189 ± 0.000000368 Da
g-factor	0
natural abundance	5.845 ± 0.105
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1923
parity	+

decay mode	Keamatan (fizik)
2β⁺ (double β⁺ decay)

⁵⁵Fe

Nombor jisim	55
nombor neutron	29
jisim atom relatif	54.938291158 ± 0.00000033 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.7562 ± 0.0004 y
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1939
parity	-

decay mode	Keamatan (fizik)
ϵ (electron capture)	100%

⁵⁶Fe

Nombor jisim	56
nombor neutron	30
jisim atom relatif	55.934935537 ± 0.000000287 Da
g-factor	0
natural abundance	91.754 ± 0.106
Reputan radioaktif	Isotop stabil
setengah hayat	Not Radioactive ☢️
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1923
parity	+

⁵⁷Fe

Nombor jisim	57
nombor neutron	31
jisim atom relatif	56.93539195 ± 0.000000287 Da
g-factor
natural abundance	2.119 ± 0.029
Reputan radioaktif	Isotop stabil
setengah hayat	Not Radioactive ☢️
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1935
parity	-

⁵⁸Fe

Nombor jisim	58
nombor neutron	32
jisim atom relatif	57.933273575 ± 0.000000339 Da
g-factor	0
natural abundance	0.282 ± 0.012
Reputan radioaktif	Isotop stabil
setengah hayat	Not Radioactive ☢️
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1935
parity	+

⁵⁹Fe

Nombor jisim	59
nombor neutron	33
jisim atom relatif	58.934873492 ± 0.000000354 Da
g-factor	-0.22386666666667 ± 0.00026666666666667
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	44.5 ± 0.012 d
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1938
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁶⁰Fe

Nombor jisim	60
nombor neutron	34
jisim atom relatif	59.934070249 ± 0.000003656 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.62 ± 0.04 My
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1957
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁶¹Fe

Nombor jisim	61
nombor neutron	35
jisim atom relatif	60.936746241 ± 0.0000028 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5.98 ± 0.06 m
Spin	3/2
nuclear quadrupole moment
tarikh penemuan	1957
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁶²Fe

Nombor jisim	62
nombor neutron	36
jisim atom relatif	61.936791809 ± 0.000003 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	68 ± 2 s
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1975
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁶³Fe

Nombor jisim	63
nombor neutron	37
jisim atom relatif	62.940272698 ± 0.000004618 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	6.1 ± 0.6 s
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1980
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁶⁴Fe

Nombor jisim	64
nombor neutron	38
jisim atom relatif	63.940987761 ± 0.000005386 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2 ± 0.2 s
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1980
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

⁶⁵Fe

Nombor jisim	65
nombor neutron	39
jisim atom relatif	64.945015323 ± 0.000005487 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	805 ± 10 ms
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1980
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁶⁶Fe

Nombor jisim	66
nombor neutron	40
jisim atom relatif	65.946249958 ± 0.0000044 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	467 ± 29 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1985
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁶⁷Fe

Nombor jisim	67
nombor neutron	41
jisim atom relatif	66.95093 ± 0.0000041 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	394 ± 9 ms
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1985
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁶⁸Fe

Nombor jisim	68
nombor neutron	42
jisim atom relatif	67.952875 ± 0.000207 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	188 ± 4 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1985
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0%

⁶⁹Fe

Nombor jisim	69
nombor neutron	43
jisim atom relatif	68.957918 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	162 ± 7 ms
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1992
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁰Fe

Nombor jisim	70
nombor neutron	44
jisim atom relatif	69.960397 ± 0.000322 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	61.4 ± 0.7 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1997
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁷¹Fe

Nombor jisim	71
nombor neutron	45
jisim atom relatif	70.965722 ± 0.000429 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	34.3 ± 2.6 ms
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1997
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷²Fe

Nombor jisim	72
nombor neutron	46
jisim atom relatif	71.968599 ± 0.000537 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	17 ± 1 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1997
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷³Fe

Nombor jisim	73
nombor neutron	47
jisim atom relatif	72.974246 ± 0.000537 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	12.9 ± 1.6 ms
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	2010
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁴Fe

Nombor jisim	74
nombor neutron	48
jisim atom relatif	73.977821 ± 0.000537 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5 ± 5 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	2010
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁵Fe

Nombor jisim	75
nombor neutron	49
jisim atom relatif	74.984219 ± 0.000644 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	2013
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁶Fe

Nombor jisim	76
nombor neutron	50
jisim atom relatif	75.988631 ± 0.000644 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	2017
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)

sejarah

penemu atau pereka	Known to the ancients.
tempat penemuan
tarikh penemuan
Etimologi	Anglo-Saxon: iron; symbol from Latin: ferrum (iron).
sebutan	EYE-ern (Inggeris)

sumber

Abundance
Abundance in Earth's crust	56,300 mg/kg
natural abundance (lautan)	0.002 mg/L
natural abundance (Tubuh manusia)	0.006 %
natural abundance (Meteoroid)	22 %
natural abundance (Matahari)	0.1 %
Abundance in Universe	0.11 %

Nuclear Screening Constants

1	s	0.619
2	p	3.9112
2	s	7.401
3	d	14.8202
3	p	13.2221
3	s	12.3239
4	s	20.566

Besi on ChemicalAid

AEDA subject keyword ID	17568
ChEBI ID	18248
ChemSpider ID	22368
CosIng number	83503
DSSTOX compound identifier	DTXCID3023710
DrugBank ID	01592
ECHA Substance Infocard ID	100.028.270
Encyclopedie berbere keyword ID	2031
Golden ID	Iron-RM8V
Great Aragonese Encyclopedia ID	6825
Gujarati Vishwakosh entry	આયર્ન-લોહ
HSDB ID	604
Human Metabolome Database ID	HMDB0015531
ID Biblioteca Nacional de España	XX524497
ID BnF	11975665r
ID Den Store Danske	jern
ID Encyclopædia Universalis	fer-l-element-metallique
ID Encyclopædia Universalis	fer-vue-d-ensemble
ID Ensiklopedia Besar Rusia dalam talian	2625019
ID Ensiklopedia Britannica Dalam Talian	science/iron-chemical-element
ID EuroVoc	981
ID Freebase	/m/025rw19
ID GND	4014002-7
ID HDS	026231
ID J9U Perpustakaan Negara Israel	987007560416405171
ID KBpedia	Iron
ID NE.se	järn
ID NKCR AUT	ph127955
ID Namuwiki	철(원소)
ID PSH	5775
ID Perbendaharaan Kata Fesyen Europeana	10552
ID Perbendaharaan Kata Pendidikan Australia	scot/2214
ID Store norske leksikon	jern
ID Tesaurus BNCF	474
ID Tesaurus STW untuk Ilmu Ekonomi	14281-3
ID Treccani	ferro
ID Vikidia Perancis	Fer
ID WordNet 3.1 Synset	14666595-n
ID YSO	11738
ID bahan DSSTox	DTXSID5043710
ID dalam talian Brockhaus Enzyklopädie	Hola
ID dalam talian Brockhaus Enzyklopädie	eisen-20
ID kewibawaan Perpustakaan Kongres	sh85068131
ID pemerihal MeSH	D007501
ID rencana Klexikon	Eisen
ID tesaurus PACTOLS	pcrtJWWucnutA0
ID tesaurus RKD	37450
ID tesaurus UNESCO	concept10788
ID topik Quora	Iron
InChI	InChI=1S/Fe
InChIKey	XEEYBQQBJWHFJM-UHFFFAOYSA-N
Italian Vikidia ID	Ferro
KEGG ID	C00023
Krugosvet article	nauka_i_tehnika/himiya/ZHELEZO.html
Language of Bindings ID	2416
Latvian National Encyclopedia Online ID	149532
LiverTox ID	Iron
Maksud Tertakrif OmegaWiki	2024
MeSH concept ID	M0011718
NALT ID	33434
NDF-RT ID	N0000146032
Nomisma ID	fe
Open Food Facts ingredient ID	iron
Probes And Drugs ID	PD009463
PubChem CID	23925
RxNorm ID	90176
Römpp online ID	RD-05-00418
Spanish Cultural Heritage thesauri ID	materias/1000924
Spanish Vikidia ID	Hierro
UK Archival Thesaurus ID	f2/mt225/4347/3178
UMLS CUI	C0302583
UNII	E1UOL152H7
USGS Thesaurus ID	1483
WikiSkripta ID	7294
ZVG number	8210
kod entiti Bahasa Wolfram	Entity["Mineral", "Iron"]
nombor pendaftaran CAS	7439-89-6
pengecam AAT	300011002
pengecam NDL	00572915

Besi (Fe)

Sifat Fizikal

Sifat Kimia

other

Isotopes of Iron

45Fe

46Fe

47Fe

48Fe

49Fe

50Fe

51Fe

52Fe

53Fe

54Fe

55Fe

56Fe

57Fe

58Fe

59Fe

60Fe

61Fe

62Fe

63Fe

64Fe

65Fe

66Fe

67Fe

68Fe

69Fe

70Fe

71Fe

72Fe

73Fe

74Fe

75Fe

76Fe

sejarah

sumber

Nuclear Screening Constants

⁴⁵Fe

⁴⁶Fe

⁴⁷Fe

⁴⁸Fe

⁴⁹Fe

⁵⁰Fe

⁵¹Fe

⁵²Fe

⁵³Fe

⁵⁴Fe

⁵⁵Fe

⁵⁶Fe

⁵⁷Fe

⁵⁸Fe

⁵⁹Fe

⁶⁰Fe

⁶¹Fe

⁶²Fe

⁶³Fe

⁶⁴Fe

⁶⁵Fe

⁶⁶Fe

⁶⁷Fe

⁶⁸Fe

⁶⁹Fe

⁷⁰Fe

⁷¹Fe

⁷²Fe

⁷³Fe

⁷⁴Fe

⁷⁵Fe

⁷⁶Fe