Jern (Fe)

grundstof med atomnummer 26

Atomnummer	26
Atommasse	55.845
mass number	56

Gruppe	8
Periode	4
Blok	d

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

Fysisk Egenskab

Atomradius	140 pm 237 pm
molar volume	7,1 cm³/mol
Kovalent Radius	116 pm 109 pm 102 pm 140 pm 142 pm
Metallic Radius	117 pm 126 pm
Ionisk 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
massefylde	7,87 g/cm³ 6.980 kg/m³

Kemisk Egenskab

energi

proton affinity	754 kJ/mol
electron affinity	0,151 eV/particle
ioniseringsenergi	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

Fordampningsvarme	340 kJ/mol
smeltevarme	13,8 kJ/mol
standard enthalpy of formation	415,5 kJ/mol
elektron

Elektronskal	2, 8, 14, 2

Valenselektron	2 ⓘ

electron configuration	[Ar] 3d⁶ 4s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²

Oxidationstrin	-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7
Elektronegativitet	10,64 eV/particle 0.1392532 1.83
Electrophilicity Index	1,045904228706801 eV/particle
fundamental state of matter

stoffase	Fast stof
gaseous state of matter
Kogepunkt	3.134,15 K
Smeltepunkt	1.811,15 K
critical pressure
critical temperature	9.340,15 K
trippelpunkt
appearance
farve	Grå #ffa500 #e06633 #e06633
appearance	lustrous metallic with a grayish tinge
Brydningsindeks
materialeegenskab
Varmeledningsevne	80,4 W/(m K)
Termisk ekspansion	0,0000118 1/K
molar heat capacity	25,1 J/(mol K)
Varmefylde	0,449 J/(g⋅K)
Adiabateksponenten
electrical properties
type	Conductor
specifik ledningsevne	10 MS/m
Elektrisk resistivitet	0,00000009700000000001 Ω*m
superledning
Magnetisme
type	ferromagnetic
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curietemperaturen	1.043 K
Néel temperature
struktur
Krystalstruktur	Rumcentreret Kubisk (BCC)
lattice constant	2,87 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hårdhed	490 MPa 4 MPa 608 MPa
Kompressibilitetsmodul	170 GPa
Forskydningsmodul	82 GPa
E-modul	211 GPa
Poissons forhold	0,29
speed of sound	4.910 m/s
klassificering
Kategori	Overgangsmetaller, Transition metals
CAS Group	VIIIA
IUPAC Group	VIII
Glawe Number	71
Mendeleev Number	59
Pettifor Number	61
Geochemical Class	major
Goldschmidt classification	siderophile

øvrige

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
quantum number	5D4
rumgruppe	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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2,5 ± 0,2 ms
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1996
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	13 ± 2 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1992
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	21,9 ± 0,2 ms
spin	7/2
nuclear quadrupole moment
opdagelsesdato	1992
Paritet	-

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	45,3 ± 0,6 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1987
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	64,7 ± 0,3 ms
spin	7/2
nuclear quadrupole moment
opdagelsesdato	1970
Paritet	-

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	152 ± 0,6 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1977
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	305,4 ± 2,3 ms
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1972
Paritet	-

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	8,275 ± 0,008 h
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1948
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	8,51 ± 0,02 m
spin	7/2
nuclear quadrupole moment
opdagelsesdato	1938
Paritet	-

decay mode	Intensitet
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
natural abundance	5,845 ± 0,105
radioaktivitet	☢️ radioactive element
halveringstid
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1923
Paritet	+

decay mode	Intensitet
2β⁺ (double β⁺ decay)

⁵⁵Fe

mass number	55
neutron number	29
Relative Atomic Mass	54,938291158 ± 0,00000033 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2,7562 ± 0,0004 y
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1939
Paritet	-

decay mode	Intensitet
ϵ (electron capture)	100%

⁵⁶Fe

mass number	56
neutron number	30
Relative Atomic Mass	55,934935537 ± 0,000000287 Da
g-factor	0
natural abundance	91,754 ± 0,106
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1923
Paritet	+

⁵⁷Fe

mass number	57
neutron number	31
Relative Atomic Mass	56,93539195 ± 0,000000287 Da
g-factor
natural abundance	2,119 ± 0,029
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1935
Paritet	-

⁵⁸Fe

mass number	58
neutron number	32
Relative Atomic Mass	57,933273575 ± 0,000000339 Da
g-factor	0
natural abundance	0,282 ± 0,012
radioaktivitet	stable isotope
halveringstid	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1935
Paritet	+

⁵⁹Fe

mass number	59
neutron number	33
Relative Atomic Mass	58,934873492 ± 0,000000354 Da
g-factor	-0,22386666666667 ± 0,00026666666666667
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	44,5 ± 0,012 d
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1938
Paritet	-

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁶⁰Fe

mass number	60
neutron number	34
Relative Atomic Mass	59,934070249 ± 0,000003656 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2,62 ± 0,04 My
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1957
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁶¹Fe

mass number	61
neutron number	35
Relative Atomic Mass	60,936746241 ± 0,0000028 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	5,98 ± 0,06 m
spin	3/2
nuclear quadrupole moment
opdagelsesdato	1957
Paritet	-

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁶²Fe

mass number	62
neutron number	36
Relative Atomic Mass	61,936791809 ± 0,000003 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	68 ± 2 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1975
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁶³Fe

mass number	63
neutron number	37
Relative Atomic Mass	62,940272698 ± 0,000004618 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	6,1 ± 0,6 s
spin	5/2
nuclear quadrupole moment
opdagelsesdato	1980
Paritet	-

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁶⁴Fe

mass number	64
neutron number	38
Relative Atomic Mass	63,940987761 ± 0,000005386 Da
g-factor	0
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	2 ± 0,2 s
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1980
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)	100%

⁶⁵Fe

mass number	65
neutron number	39
Relative Atomic Mass	64,945015323 ± 0,000005487 Da
g-factor
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	805 ± 10 ms
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1980
Paritet	-

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	467 ± 29 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1985
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	394 ± 9 ms
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1985
Paritet	-

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	188 ± 4 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1985
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	162 ± 7 ms
spin	1/2
nuclear quadrupole moment	0
opdagelsesdato	1992
Paritet	-

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	61,4 ± 0,7 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	34,3 ± 2,6 ms
spin	7/2
nuclear quadrupole moment
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	17 ± 1 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	1997
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	12,9 ± 1,6 ms
spin	7/2
nuclear quadrupole moment
opdagelsesdato	2010
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid	5 ± 5 ms
spin	0
nuclear quadrupole moment	0
opdagelsesdato	2010
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	9/2
nuclear quadrupole moment
opdagelsesdato	2013
Paritet	+

decay mode	Intensitet
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
natural abundance
radioaktivitet	☢️ radioactive element
halveringstid
spin	0
nuclear quadrupole moment	0
opdagelsesdato	2017
Paritet	+

decay mode	Intensitet
β⁻ (β⁻ decay)

historie

opdager eller opfinder	Known to the ancients.
fundsted
opdagelsesdato
etymologi	Anglo-Saxon: iron; symbol from Latin: ferrum (iron).
udtale	EYE-ern (engelsk)

source

Forekomst
Abundance in Earth's crust	56.300 mg/kg
natural abundance (verdenshave)	0,002 mg/L
natural abundance (menneskelige krop)	0,006 %
natural abundance (Meteoroid)	22 %
natural abundance (Solen)	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

Jern on ChemicalAid

AEDA subject keyword ID	17568
AUT NKC	ph127955
Art & Architecture Thesaurus ID	300011002
Australian Educational Vocabulary ID	scot/2214
BNCF	474
BNE-identifikator	XX524497
BNF	11975665r
Brockhaus Enzyklopädie online ID	Hola
Brockhaus Enzyklopädie online ID	eisen-20
CAS-nummer	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
Enciclopedia Treccani	ferro
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 Ordforråd-id	10552
Freebase-ID	/m/025rw19
French Vikidia ID	Fer
GND-identifikator	4014002-7
Golden ID	Iron-RM8V
Gujarati Vishwakosh entry	આયર્ન-લોહ
HDS	026231
HMDB-ID	HMDB0015531
HSDB-ID	604
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
LCAuth	sh85068131
Language of Bindings ID	2416
Latvian National Encyclopedia Online ID	149532
LiverTox ID	Iron
MeSH ID	D007501
MeSH concept ID	M0011718
NALT ID	33434
NDF-RT ID	N0000146032
NDL-nummer	00572915
NE.se ID	järn
Namuwiki ID	철(원소)
National Library of Israel J9U ID	987007560416405171
Nomisma ID	fe
OmegaWiki-betydningsdefinition	2024
Open Food Facts ingredient ID	iron
PACTOLS thesaurus ID	pcrtJWWucnutA0
PSH-ID	5775
Probes And Drugs ID	PD009463
PubChem CID	23925
Quora emne-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 Aragonske Encyklopædi-ID	6825
Store norske leksikon-ID	jern
Store russiske encyklopædi Online-ID	2625019
UK Archival Thesaurus ID	f2/mt225/4347/3178
UMLS CUI	C0302583
UNESCO-tesaurus identifikationskode	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-nummer	8210

Jern (Fe)

Fysisk Egenskab

Kemisk Egenskab

øvrige

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

historie

source

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