Iron (Fe)

Iron is the 26th element in the periodic table and has a symbol of Fe and atomic number of 26. It has an atomic weight of 55.845 and a mass number of 56. Iron has twenty-six protons and thirty neutrons in its nucleus, and twenty-six electrons in four shells. It is located in group eight, period four and block d of the periodic table. Silvery malleable and ductile metallic transition element. Has nine isotopes and is the fourth most abundant element in the earth's crust. Required by living organisms as a trace element (used in hemoglobin in humans.) Quite reactive, oxidizes in moist air, displaces hydrogen from dilute acids and combines with nonmetallic elements.

Atomic Number	26
Atomic Weight	55.845
Mass Number	56

Group	8
Period	4
Block	d

Protons	26 p⁺
Neutrons	30 n⁰
Electrons	26 e^-

Physical Properties

Atomic Radius	140 pm 237 pm
Molar Volume	7.1 cm³/mol
Covalent Radius	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
Van der Waals Radius	205 pm 204 pm 223 pm 291.2 pm
Density	7.87 g/cm³ 6,980 kg/m³

Chemical Properties

Energy

Proton Affinity	754 kJ/mol
Electron Affinity	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

Heat of Vaporization	340 kJ/mol
Heat of Fusion	13.8 kJ/mol
Heat of Formation	415.5 kJ/mol
Electrons

Electron Shells	2, 8, 14, 2

Valence Electrons	2 ⓘ

Electron Configuration	[Ar] 3d⁶ 4s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²

Oxidation States	-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7
Electronegativity	10.64 eV/particle 0.1392532 1.83
Electrophilicity Index	1.045904228706801 eV/particle
States of Matter

Phase	Solid
Gas Phase
Boiling Point	3,134.15 K
Melting Point	1,811.15 K
Critical Pressure
Critical Temperature	9,340.15 K
Triple Point
Visual
Iron is a Gray. Fe has a CPK of #ffa500, Jmol of #e06633, and MOLCAS GV of #e06633. The Appearance of Element 26 is lustrous metallic with a grayish tinge.
Color	Gray #ffa500 #e06633 #e06633
Appearance	lustrous metallic with a grayish tinge
Refractive Index
Thermodynamic Properties
Thermal Conductivity	80.4 W/(m K)
Thermal Expansion	0.0000118 1/K
Molar Heat Capacity	25.1 J/(mol K)
Specific Heat Capacity	0.449 J/(g⋅K)
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type	Conductor
Electrical Conductivity	10 MS/m
Electrical Resistivity	0.00000009700000000001 m Ω
Superconducting Point
Magnetism
Type	ferromagnetic
Magnetic Susceptibility (Mass)
Magnetic Susceptibility (Molar)
Magnetic Susceptibility (Volume)
Magnetic Ordering
Curie Point	1,043 K
Neel Point
Structure
The Crystal Structure of Iron is BCC. The lattice constant of Fe is 2.87 Å. The lattice angles of Element 26 are π/2, π/2, π/2.
Crystal Structure	Body Centered Cubic (BCC)
Lattice Constant	2.87 Å
Lattice Angles	π/2, π/2, π/2
Mechanical Properties
Iron has a Brinell of 490 MPa, Mohs hardness of 4 MPa, and Vickers of 608 MPa. The Bulk Modulus of Fe is 170 GPa. The Shear Modulus of Element 26 is 82 GPa. The Young Modulus of Iron (Fe) is 211 GPa. The Poisson Ratio of Iron is 0.29. The Speed of Sound of Fe is 4910 m/s.
Hardness	490 MPa 4 MPa 608 MPa
Bulk Modulus	170 GPa
Shear Modulus	82 GPa
Young's Modulus	211 GPa
Poisson Ratio	0.29
Speed of Sound	4,910 m/s
Classification
The CAS Group of Iron is VIIIA. The IUPAC Group of Fe is VIII. The Glawe Number of Element 26 is 71. The Mendeleev Number of Iron (Fe) is 59. The Pettifor Number of Iron is 61. The Geochemical Class of Fe is major. The Goldschmidt Class of Element 26 is siderophile.
Category	Transition metals, Transition metals
CAS Group	VIIIA
IUPAC Group	VIII
Glawe Number	71
Mendeleev Number	59
Pettifor Number	61
Geochemical Class	major
Goldschmidt Class	siderophile

Other

The Gas Basicity of Iron is 731.1 kJ/mol. The Dipole Polarizability of Fe is 62 plus or minus 4 a₀. Element 26 has a C6 Dispersion Coefficient (CD) of 482 a₀, and C6 Dispersion Coefficient (GB) of 548 a₀. The Allotropes of Iron (Fe) is . The Neutron Cross Section of Iron is 2.56. The Neutron Mass Absorption of Fe is 0.0015. The Quantum Numbers of Element 26 is 5D4. The Space Group of Iron (Fe) is 229 (Im_3m).

Gas Basicity	731.1 kJ/mol
Dipole Polarizability	62 ± 4 a₀
C6 Dispersion Coefficient	482 a₀ 548 a₀
Allotropes
Neutron Cross Section	2.56
Neutron Mass Absorption	0.0015
Quantum Numbers	5D4
Space Group	229 (Im_3m)

Isotopes of Iron

Stable Isotopes	3
Unstable Isotopes	29
Natural Isotopes	4

⁴⁵Fe

Mass Number	45
Neutron Number	19
Relative Atomic Mass	45.015467 ± 0.000304 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.5 ± 0.2 ms
Spin	3/2
Quadrupole Moment
Discovery Year	1996
Parity	+

Decay Mode	Intensity
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 Number	46
Neutron Number	20
Relative Atomic Mass	46.001299 ± 0.000322 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	13 ± 2 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1992
Parity	+

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

⁴⁷Fe

Mass Number	47
Neutron Number	21
Relative Atomic Mass	46.992346 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	21.9 ± 0.2 ms
Spin	7/2
Quadrupole Moment
Discovery Year	1992
Parity	-

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

⁴⁸Fe

Mass Number	48
Neutron Number	22
Relative Atomic Mass	47.980667 ± 0.000099 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	45.3 ± 0.6 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1987
Parity	+

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

⁴⁹Fe

Mass Number	49
Neutron Number	23
Relative Atomic Mass	48.973429 ± 0.000026 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	64.7 ± 0.3 ms
Spin	7/2
Quadrupole Moment
Discovery Year	1970
Parity	-

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

⁵⁰Fe

Mass Number	50
Neutron Number	24
Relative Atomic Mass	49.962988 ± 0.000009 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	152 ± 0.6 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1977
Parity	+

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

⁵¹Fe

Mass Number	51
Neutron Number	25
Relative Atomic Mass	50.956855137 ± 0.000001501 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	305.4 ± 2.3 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1972
Parity	-

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁵²Fe

Mass Number	52
Neutron Number	26
Relative Atomic Mass	51.948113364 ± 0.000000192 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	8.275 ± 0.008 h
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁵³Fe

Mass Number	53
Neutron Number	27
Relative Atomic Mass	52.945305629 ± 0.000001792 Da
G-Factor	-0.18571428571429 ± 0.0028571428571429
Abundance
Radioactivity	☢️ Radioactive
Half Life	8.51 ± 0.02 m
Spin	7/2
Quadrupole Moment
Discovery Year	1938
Parity	-

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁵⁴Fe

Mass Number	54
Neutron Number	28
Relative Atomic Mass	53.939608189 ± 0.000000368 Da
G-Factor	0
Abundance	5.845 ± 0.105
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1923
Parity	+

Decay Mode	Intensity
2β⁺ (double β⁺ decay)

⁵⁵Fe

Mass Number	55
Neutron Number	29
Relative Atomic Mass	54.938291158 ± 0.00000033 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.7562 ± 0.0004 y
Spin	3/2
Quadrupole Moment
Discovery Year	1939
Parity	-

Decay Mode	Intensity
ϵ (electron capture)	100%

⁵⁶Fe

Mass Number	56
Neutron Number	30
Relative Atomic Mass	55.934935537 ± 0.000000287 Da
G-Factor	0
Abundance	91.754 ± 0.106
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	0
Quadrupole Moment	0
Discovery Year	1923
Parity	+

⁵⁷Fe

Mass Number	57
Neutron Number	31
Relative Atomic Mass	56.93539195 ± 0.000000287 Da
G-Factor
Abundance	2.119 ± 0.029
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	1/2
Quadrupole Moment	0
Discovery Year	1935
Parity	-

⁵⁸Fe

Mass Number	58
Neutron Number	32
Relative Atomic Mass	57.933273575 ± 0.000000339 Da
G-Factor	0
Abundance	0.282 ± 0.012
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	0
Quadrupole Moment	0
Discovery Year	1935
Parity	+

⁵⁹Fe

Mass Number	59
Neutron Number	33
Relative Atomic Mass	58.934873492 ± 0.000000354 Da
G-Factor	-0.22386666666667 ± 0.00026666666666667
Abundance
Radioactivity	☢️ Radioactive
Half Life	44.5 ± 0.012 d
Spin	3/2
Quadrupole Moment
Discovery Year	1938
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

⁶⁰Fe

Mass Number	60
Neutron Number	34
Relative Atomic Mass	59.934070249 ± 0.000003656 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.62 ± 0.04 My
Spin	0
Quadrupole Moment	0
Discovery Year	1957
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

⁶¹Fe

Mass Number	61
Neutron Number	35
Relative Atomic Mass	60.936746241 ± 0.0000028 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.98 ± 0.06 m
Spin	3/2
Quadrupole Moment
Discovery Year	1957
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

⁶²Fe

Mass Number	62
Neutron Number	36
Relative Atomic Mass	61.936791809 ± 0.000003 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	68 ± 2 s
Spin	0
Quadrupole Moment	0
Discovery Year	1975
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

⁶³Fe

Mass Number	63
Neutron Number	37
Relative Atomic Mass	62.940272698 ± 0.000004618 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	6.1 ± 0.6 s
Spin	5/2
Quadrupole Moment
Discovery Year	1980
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

⁶⁴Fe

Mass Number	64
Neutron Number	38
Relative Atomic Mass	63.940987761 ± 0.000005386 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	2 ± 0.2 s
Spin	0
Quadrupole Moment	0
Discovery Year	1980
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

⁶⁵Fe

Mass Number	65
Neutron Number	39
Relative Atomic Mass	64.945015323 ± 0.000005487 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	805 ± 10 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	1980
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁶⁶Fe

Mass Number	66
Neutron Number	40
Relative Atomic Mass	65.946249958 ± 0.0000044 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	467 ± 29 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1985
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁶⁷Fe

Mass Number	67
Neutron Number	41
Relative Atomic Mass	66.95093 ± 0.0000041 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	394 ± 9 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	1985
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁶⁸Fe

Mass Number	68
Neutron Number	42
Relative Atomic Mass	67.952875 ± 0.000207 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	188 ± 4 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1985
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0%

⁶⁹Fe

Mass Number	69
Neutron Number	43
Relative Atomic Mass	68.957918 ± 0.000215 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	162 ± 7 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	1992
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁰Fe

Mass Number	70
Neutron Number	44
Relative Atomic Mass	69.960397 ± 0.000322 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	61.4 ± 0.7 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1997
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

⁷¹Fe

Mass Number	71
Neutron Number	45
Relative Atomic Mass	70.965722 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	34.3 ± 2.6 ms
Spin	7/2
Quadrupole Moment
Discovery Year	1997
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷²Fe

Mass Number	72
Neutron Number	46
Relative Atomic Mass	71.968599 ± 0.000537 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	17 ± 1 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1997
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷³Fe

Mass Number	73
Neutron Number	47
Relative Atomic Mass	72.974246 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	12.9 ± 1.6 ms
Spin	7/2
Quadrupole Moment
Discovery Year	2010
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁴Fe

Mass Number	74
Neutron Number	48
Relative Atomic Mass	73.977821 ± 0.000537 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	5 ± 5 ms
Spin	0
Quadrupole Moment	0
Discovery Year	2010
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁵Fe

Mass Number	75
Neutron Number	49
Relative Atomic Mass	74.984219 ± 0.000644 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	9/2
Quadrupole Moment
Discovery Year	2013
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

⁷⁶Fe

Mass Number	76
Neutron Number	50
Relative Atomic Mass	75.988631 ± 0.000644 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2017
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)

History

The first iron used by humans is likely to have come from meteorites. The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in about 4000 BC. The discovery of smelting around 3000 BC led to the start of the iron age around 1200 BC and the prominent use of iron for tools and weapons. From the Latin word ferrum

Discoverers	Known to the ancients.
Discovery Location
Discovery Year
Etymology (Name Origin)	Anglo-Saxon: iron; symbol from Latin: ferrum (iron).
Pronunciation	EYE-ern (English)

Iron is considered to be non-toxic

The color of blood is due to the hemoglobin, an iron-containing protein

Uses

Iron is used to manufacture steel and other alloys important in construction and manufacturing. Iron is a vital constituent of plant and animal life and works as an oxygen carrier in hemoglobin. Iron oxide mixed with aluminum powder can be ignited to create a thermite reaction, used in welding and purifying ores. Used in steel and other alloys. Essential for humans. It is the chief constituent of hemoglobin which carries oxygen in blood vessels. Its oxides are used in magnetic tapes and disks.

Sources

Obtained from iron ores. Pure metal produced in blast furnaces by layering limestone, coke and iron ore and forcing hot gasses into the bottom. This heats the coke red hot and the iron is reduced from its oxides and liquified where it flows to the bottom

Abundance
Abundance in Earth's crust	56,300 mg/kg
Natural Abundance (Oceans)	0.002 mg/L
Natural Abundance (Human Body)	0.006 %
Natural Abundance (Meteor)	22 %
Natural Abundance (Sun)	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

Also Known As

Fe
element 26
26Fe

Translations

Frenchfer
Italianferro
Spanishhierro
Norwegian Bokmåljern
GermanEisen
Dutchijzer
Chinese (Traditional)鐵
Afrikaansyster
Amharicብረት
AragoneseFierro
Old EnglishĪsen
Arabicحديد
Aramaicܦܪܙܠܐ
AsturianFierro
AzerbaijaniDəmir
BashkirТимер
BelarusianЖалеза
Bulgarianжелязо
BanjarWasi
Banglaলোহা
BretonHouarn
Bosnianželjezo
Catalanferro
CherokeeᏔᎷᎩᏍᎩ
Central Kurdishئاسن
CorsicanFerru
Czechželezo
ChuvashТимĕр
WelshHaearn
Danishjern
Divehiދަގަނޑު
Greekσίδηρος
Esperantofero
Estonianraud
Basqueburdina
ExtremaduranHierru
Persianآهن
Finnishrauta
Northern FrisianStälj
FriulianFier
Western FrisianIzer
IrishIarann
Gan Chinese鐵
Scottish GaelicIarann
Galicianferro
GuaraniItakandua
Gujaratiલોખંડ
ManxYiarn
Hakka ChineseThiet
Hebrewברזל
Hindiलोहा
Fiji HindiLoha
Croatianželjezo
Haitian CreoleFè
Hungarianvas
Armenianերկաթ
Interlinguaferro
Indonesianbesi
InterlingueFerre
Idofero
Icelandicjárn
Japanese鉄
Lojbantirse
Javanesewesi
Georgianრკინა
KongoKibende
KazakhТемір
Kannadaಕಬ್ಬಿಣ
Korean철
Komi-Permyakкӧрт
ColognianEisen
KurdishHesin
Komiкӧрт
CornishHorn
Latinferrum
LuxembourgishEisen
lbeМах
LimburgishIezer
LigurianFæro
LombardFer
LingalaEbendé
LithuanianGeležis
Latviandzelzs
MalagasyVy
Māoririno
Macedonianжелезо
Malayalamഇരുമ്പ്
Mongolianтөмөр
Marathiलोखंड
Malaybesi
Malteseħadid
Burmeseသံ
Erzyaкшни
nahTlīltic tepoztli
Low GermanIesen
Low German (Netherlands)Iezer
Nepaliफलाम
Newariनँ
Norwegian Nynorskjern
nrmFé
NavajoBéésh
OccitanFèrre
Odiaଲୌହ
OsseticÆфсæйнаг
Punjabiਲੋਹਾ
Papiamentoheru
Polishżelazo
Western Panjabiلوآ
Pashtoاوسپنه
Portugueseferro
QuechuaKhillay
Romanianfier
Russianжелезо
RusynЖелїзо
Sanskritअयः
YakutТимир
Sicilianferru
Scotsairn
Serbo-Croatianželjezo
Slovakželezo
Slovenianželezo
SomaliBir
AlbanianHekuri
Serbianгвожде
Saterland FrisianIersen
Swedishjärn
SwahiliChuma
Tamilஇரும்பு
Teluguఇనుము
TajikОҳан
Thaiเหล็ก
TagalogBakal
TurkishDemir
Uyghurتۆمۈر
Ukrainianзалізо
Urduلوہا
UzbekTemir
VenetianFero
VepsRaud
Vietnamesesắt
West FlemishYzer
WalloonFier
WarayPuthaw
KalmykТөмр
Yiddishאייזן
YorubaIron
ZhuangDiet
Chinese鐵
BislamaAean
CebuanoYero
German (Switzerland)Eisen
ZazaAsın
English (Canada)iron
English (United Kingdom)iron
Portuguese (Brazil)ferro
Cantonese鐵
LezghianРакь
PiedmonteseFer
Tatarтимер
FaroeseJarn
KikuyuIron
Swiss GermanIise
SamogitianGelžis
Min Nan ChineseThih
Literary Chinese鐵
Belarusian (Taraskievica orthography)жалеза
VõroRaud
NeapolitanFierro
BuriatТүмэр
KabyleUzzal
Sinhalaයකඩ
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Iron on ChemicalAid

AEDA subject keyword ID	17568
Art & Architecture Thesaurus ID	300011002
Australian Educational Vocabulary ID	scot/2214
BNCF Thesaurus ID	474
Biblioteca Nacional de España ID	XX524497
Bibliothèque nationale de France ID	11975665r
Brockhaus Enzyklopädie online ID	Hola
Brockhaus Enzyklopädie online ID	eisen-20
CAS Registry Number	7439-89-6
ChEBI ID	18248
ChemSpider ID	22368
CosIng number	83503
DSSTOX compound identifier	DTXCID3023710
DSSTox substance ID	DTXSID5043710
Den Store Danske ID	jern
DrugBank ID	01592
ECHA Substance Infocard ID	100.028.270
Encyclopedie berbere keyword ID	2031
Encyclopædia Britannica Online ID	science/iron-chemical-element
Encyclopædia Universalis ID	fer-l-element-metallique
Encyclopædia Universalis ID	fer-vue-d-ensemble
EuroVoc ID	981
Europeana Fashion Vocabulary ID	10552
Freebase ID	/m/025rw19
French Vikidia ID	Fer
GND ID	4014002-7
Golden ID	Iron-RM8V
Great Aragonese Encyclopedia ID	6825
Great Russian Encyclopedia Online ID	2625019
Gujarati Vishwakosh entry	આયર્ન-લોહ
HDS ID	026231
HSDB ID	604
Human Metabolome Database ID	HMDB0015531
InChI	InChI=1S/Fe
InChIKey	XEEYBQQBJWHFJM-UHFFFAOYSA-N
Italian Vikidia ID	Ferro
KBpedia ID	Iron
KEGG ID	C00023
Klexikon article ID	Eisen
Krugosvet article	nauka_i_tehnika/himiya/ZHELEZO.html
Language of Bindings ID	2416
Latvian National Encyclopedia Online ID	149532
Library of Congress authority ID	sh85068131
LiverTox ID	Iron
MeSH concept ID	M0011718
MeSH descriptor ID	D007501
NALT ID	33434
NDF-RT ID	N0000146032
NDL Authority ID	00572915
NE.se ID	järn
NKCR AUT ID	ph127955
Namuwiki ID	철(원소)
National Library of Israel J9U ID	987007560416405171
Nomisma ID	fe
OmegaWiki Defined Meaning	2024
Open Food Facts ingredient ID	iron
PACTOLS thesaurus ID	pcrtJWWucnutA0
PSH ID	5775
Probes And Drugs ID	PD009463
PubChem CID	23925
Quora topic ID	Iron
RKD thesaurus ID	37450
RxNorm ID	90176
Römpp online ID	RD-05-00418
STW Thesaurus for Economics ID	14281-3
Spanish Cultural Heritage thesauri ID	materias/1000924
Spanish Vikidia ID	Hierro
Store norske leksikon ID	jern
Treccani ID	ferro
UK Archival Thesaurus ID	f2/mt225/4347/3178
UMLS CUI	C0302583
UNESCO Thesaurus ID	concept10788
UNII	E1UOL152H7
USGS Thesaurus ID	1483
WikiSkripta ID	7294
Wolfram Language entity code	Entity["Mineral", "Iron"]
WordNet 3.1 Synset ID	14666595-n
YSO ID	11738
ZVG number	8210

Iron (Fe)

Physical Properties

Chemical Properties

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