Cróimiam (Cr)

chemical element with symbol Cr and atomic number 24

Atomic Number	24
Atomic Weight	51.9961
Núicléónuimhir	52

Group	6
Period	4
Block	d

prótón	24 p⁺
neodrón	28 n⁰
leictreon	24 e^-

Physical Property

Ga Adamhach	140 pm 233 pm
molar volume	7.23 cm³/mol
covalent radius	122 pm 111 pm 103 pm 140 pm 139 pm
Metallic Radius	119 pm 128 pm
ionic radius	73 pm 80 pm 61.5 pm 41 pm 55 pm 34.5 pm 49 pm 57 pm 26 pm 44 pm
Crystal Radius	87 pm 94 pm 75.5 pm 55 pm 69 pm 48.5 pm 63 pm 71 pm 40 pm 58 pm
Van der Waals radius	205 pm 206 pm 225 pm 302.3 pm
dlús	7.15 g/cm³ 6,300 kg/m³

Chemical Property

fuinneamh

proton affinity	791.3 kJ/mol
electron affinity	0.666 eV/particle
ionization energy	6.76651 eV/particle 16.486305 eV/particle 30.96 eV/particle 49.16 eV/particle 69.46 eV/particle 90.635 eV/particle 160.29 eV/particle 184.76 eV/particle 209.54 eV/particle 244.52 eV/particle 270.8 eV/particle 296.74 eV/particle 354.66 eV/particle 384.163 eV/particle 1,011.62 eV/particle 1,097.2 eV/particle 1,188 eV/particle 1,294.8 eV/particle 1,394.5 eV/particle 1,495.1 eV/particle 1,634 eV/particle 1,721.183 eV/particle 7,481.8625 eV/particle 7,894.799 eV/particle

enthalpy of vaporization	342 kJ/mol
enthalpy of fusion	21 kJ/mol
eantalpacht chaighdeánach an fhoirmithe	397.48 kJ/mol
leictreon

electron shell	2, 8, 13, 1

Fiúsleictreon	1 ⓘ

cumraíocht leictreon	[Ar] 3d⁵ 4s¹ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹

Staid ocsaídiúcháine	-4, -2, -1, 0, 1, 2, 3, 4, 5, 6
Leictridhiúltacht	9.77 eV/particle 0.1313053 1.66
Electrophilicity Index	1.1319177597467263 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point	2,944.15 K
Melting Point	2,180.15 K
critical pressure
critical temperature
triple point
appearance
dath	Silver #808090 #8a99c7 #8a99c7
appearance	silvery metallic
Comhéifeacht athraonta
thermodynamic material property
Thermal Conductivity	93.9 W/(m K)
Forbairt theirmeach	0.0000049 1/K
molar heat capacity	23.35 J/(mol K)
Specific Heat Capacity	0.449 J/(g⋅K)
Cóimheas saintoilleadh teasa
electrical properties
type	Conductor
electrical conductivity	7.9 MS/m
Friotachas	0.00000013 Ω*m
Forsheoltacht
Maighnéadas
type	antiferromagnetic
So-ghabhálacht mhaighnéadach (Mass)	0.0000000445 m³/Kg
So-ghabhálacht mhaighnéadach (Molar)	0.000000002314 m³/mol
So-ghabhálacht mhaighnéadach (Volume)	0.0003177
magnetic ordering
Teocht Curie
Néel temperature	393 K
struchtúr
Crystal Structure	Body Centered Cubic (BCC)
lattice constant	2.88 Å
Lattice Angles	π/2, π/2, π/2
airíonna meicniúla
Cruas	1,120 MPa 8.5 MPa 1,060 MPa
Modal toirte	160 GPa
modal fiartha	115 GPa
modal Young	279 GPa
Cóimheas Poisson	0.21
luas forleata fuaime	5,940 m/s
aicmiúchán
Category	Transition metals, Transition metals
CAS Group	VIA
IUPAC Group	VIB
Glawe Number	55
Mendeleev Number	51
Pettifor Number	57
Geochemical Class	first series transition metal
Goldschmidt classification	litophile

eile

Gas Basicity	768.4 kJ/mol
polarizability	83 ± 12 a₀
C6 Dispersion Coefficient	602 a₀ 709 a₀
allotrope
Crosghearradh	3.1
Neutron Mass Absorption	0.0021
Uimhir chandamach	7S3
space group	229 (Im_3m)

Isotopes of Chromium

Stable Isotopes	3
Unstable Isotopes	27
Natural Isotopes	4

⁴¹Cr

Núicléónuimhir	41
neutron number	17
Mais Adamhach Choibhneasta	41.021911 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh
Paireacht	+

decay mode	intensity
p (proton emission)

⁴²Cr

Núicléónuimhir	42
neutron number	18
Mais Adamhach Choibhneasta	42.007579 ± 0.000322 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	13.3 ± 1 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1996
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	94.4%
2p (2-proton emission)

⁴³Cr

Núicléónuimhir	43
neutron number	19
Mais Adamhach Choibhneasta	42.997885 ± 0.000215 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	21.1 ± 0.3 ms
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1992
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	79.3%
2p (2-proton emission)	11.6%
3p	0.13%
β⁺α (β⁺-delayed α emission)

⁴⁴Cr

Núicléónuimhir	44
neutron number	20
Mais Adamhach Choibhneasta	43.985591 ± 0.000055 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	42.8 ± 0.6 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1987
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	12%

⁴⁵Cr

Núicléónuimhir	45
neutron number	21
Mais Adamhach Choibhneasta	44.97905 ± 0.000038 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	60.9 ± 0.4 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1974
Paireacht	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	34.4%

⁴⁶Cr

Núicléónuimhir	46
neutron number	22
Mais Adamhach Choibhneasta	45.968360969 ± 0.000012295 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	224.3 ± 1.3 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1972
Paireacht	+

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

⁴⁷Cr

Núicléónuimhir	47
neutron number	23
Mais Adamhach Choibhneasta	46.962894995 ± 0.000005578 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	461.6 ± 1.5 ms
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1972
Paireacht	-

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

⁴⁸Cr

Núicléónuimhir	48
neutron number	24
Mais Adamhach Choibhneasta	47.954029431 ± 0.000007848 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	21.56 ± 0.03 h
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1952
Paireacht	+

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

⁴⁹Cr

Núicléónuimhir	49
neutron number	25
Mais Adamhach Choibhneasta	48.95133372 ± 0.000002363 Da
G-fhachtóir	0.1904 ± 0.0012
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	42.3 ± 0.1 m
Guairne	5/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1942
Paireacht	-

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

⁵⁰Cr

Núicléónuimhir	50
neutron number	26
Mais Adamhach Choibhneasta	49.946042209 ± 0.0000001 Da
G-fhachtóir	0
natural abundance	4.345 ± 0.013
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1930
Paireacht	+

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

⁵¹Cr

Núicléónuimhir	51
neutron number	27
Mais Adamhach Choibhneasta	50.944765388 ± 0.000000178 Da
G-fhachtóir	0.26685714285714 ± 0.0014285714285714
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	27.7015 ± 0.0011 d
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1940
Paireacht	-

decay mode	intensity
ϵ (electron capture)	100%

⁵²Cr

Núicléónuimhir	52
neutron number	28
Mais Adamhach Choibhneasta	51.940504714 ± 0.00000012 Da
G-fhachtóir	0
natural abundance	83.789 ± 0.018
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1923
Paireacht	+

⁵³Cr

Núicléónuimhir	53
neutron number	29
Mais Adamhach Choibhneasta	52.940646304 ± 0.000000124 Da
G-fhachtóir
natural abundance	9.501 ± 0.017
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	3/2
nuclear quadrupole moment	-0.15 ± 0.05
dáta fionnachtana nó tionscnaimh	1930
Paireacht	-

⁵⁴Cr

Núicléónuimhir	54
neutron number	30
Mais Adamhach Choibhneasta	53.938877359 ± 0.000000142 Da
G-fhachtóir	0
natural abundance	2.365 ± 0.007
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1930
Paireacht	+

⁵⁵Cr

Núicléónuimhir	55
neutron number	31
Mais Adamhach Choibhneasta	54.940836637 ± 0.000000245 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	3.497 ± 0.003 m
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1952
Paireacht	-

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

⁵⁶Cr

Núicléónuimhir	56
neutron number	32
Mais Adamhach Choibhneasta	55.940648977 ± 0.00000062 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	5.94 ± 0.1 m
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1960
Paireacht	+

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

⁵⁷Cr

Núicléónuimhir	57
neutron number	33
Mais Adamhach Choibhneasta	56.943612112 ± 0.000002 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	21.1 ± 1 s
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1978
Paireacht

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

⁵⁸Cr

Núicléónuimhir	58
neutron number	34
Mais Adamhach Choibhneasta	57.944184501 ± 0.0000032 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	7 ± 0.3 s
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1980
Paireacht	+

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

⁵⁹Cr

Núicléónuimhir	59
neutron number	35
Mais Adamhach Choibhneasta	58.948345426 ± 0.00000072 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1,050 ± 90 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1980
Paireacht	-

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

⁶⁰Cr

Núicléónuimhir	60
neutron number	36
Mais Adamhach Choibhneasta	59.949641656 ± 0.0000012 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	490 ± 10 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1980
Paireacht	+

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

⁶¹Cr

Núicléónuimhir	61
neutron number	37
Mais Adamhach Choibhneasta	60.95437813 ± 0.000002 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	243 ± 9 ms
Guairne	5/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1985
Paireacht	-

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

⁶²Cr

Núicléónuimhir	62
neutron number	38
Mais Adamhach Choibhneasta	61.95614292 ± 0.0000037 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	206 ± 12 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1985
Paireacht	+

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

⁶³Cr

Núicléónuimhir	63
neutron number	39
Mais Adamhach Choibhneasta	62.961161 ± 0.000078 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	129 ± 2 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1992
Paireacht	-

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

⁶⁴Cr

Núicléónuimhir	64
neutron number	40
Mais Adamhach Choibhneasta	63.963886 ± 0.000322 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	43 ± 1 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1992
Paireacht	+

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

⁶⁵Cr

Núicléónuimhir	65
neutron number	41
Mais Adamhach Choibhneasta	64.969608 ± 0.000215 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	27.5 ± 2.1 ms
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1997
Paireacht	-

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

⁶⁶Cr

Núicléónuimhir	66
neutron number	42
Mais Adamhach Choibhneasta	65.973011 ± 0.000322 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	23.8 ± 1.8 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1997
Paireacht	+

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

⁶⁷Cr

Núicléónuimhir	67
neutron number	43
Mais Adamhach Choibhneasta	66.979313 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1997
Paireacht	-

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

⁶⁸Cr

Núicléónuimhir	68
neutron number	44
Mais Adamhach Choibhneasta	67.983156 ± 0.000537 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2009
Paireacht	+

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

⁶⁹Cr

Núicléónuimhir	69
neutron number	45
Mais Adamhach Choibhneasta	68.989662 ± 0.000537 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2013
Paireacht	+

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

⁷⁰Cr

Núicléónuimhir	70
neutron number	46
Mais Adamhach Choibhneasta	69.993945 ± 0.000644 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	2013
Paireacht	+

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

stair

fionnachtaí nó aireagóir	Louis Vauquelin
áit ar tháinig air/uirthi	France
dáta fionnachtana nó tionscnaimh	1797
Sanasaíocht	Greek: chrôma (color).
pronunciation	KROH-mi-em (Béarla)

foinse

Abundance
Abundance in Earth's crust	102 mg/kg
natural abundance (aigéan)	0.0003 mg/L
natural abundance (corp an duine)	0.000003 %
natural abundance (dreigeoideach)	0.3 %
natural abundance (An Ghrian)	0.002 %
Abundance in Universe	0.0015 %

Nuclear Screening Constants

1	s	0.5862
2	p	3.9248
2	s	7.0162
3	d	14.2434
3	p	12.534
3	s	11.6322
4	s	18.8668

Cróimiam on ChemicalAid

ASC Leiden Thesaurus ID	294904409
Art & Architecture Thesaurus ID	300011019
Australian Educational Vocabulary ID	scot/3730
BNCF Thesaurus ID	22189
Bibliothèque nationale de France ID	12104829h
Brockhaus Enzyklopädie online ID	chrom
Canadian Encyclopedia article ID	chromium
ChEBI ID	28073
DSSTOX compound identifier	DTXCID1011022
DSSTox substance ID	DTXSID3031022
DrugBank ID	11136
ECHA Substance Infocard ID	100.028.324
Encyclopedia of China ID (Second Edition)	204079
Encyclopædia Britannica Online ID	science/chromium
Encyclopædia Universalis ID	chrome
Europeana Fashion Vocabulary ID	10554
Freebase ID	/m/025tkr6
French Vikidia ID	Chrome
Great Russian Encyclopedia Online ID	4671100
Grove Art Online ID	T017513
HSDB ID	910
ICSC ID	0029
ID GND	4147944-0
ID na topaice ar Quora	Chromium-element
IEDB Epitope ID	114071
InChI	InChI=1S/Cr
InChIKey	VYZAMTAEIAYCRO-UHFFFAOYSA-N
KBpedia ID	Chromium
KEGG ID	C06268
Krugosvet article	nauka_i_tehnika/himiya/HROM.html
Latvian National Encyclopedia Online ID	145861
MeSH descriptor ID	D002857
Mindat mineral ID	1037
NDF-RT ID	N0000146088
NDL Authority ID	00567040
NE.se ID	cr-(krom)
NKCR AUT ID	ph119207
Namuwiki ID	크로뮴
National Library of Israel J9U ID	987007286324805171
OmegaWiki Defined Meaning	585
OpenAlex ID	C511782168
OpenAlex ID	C2909514155
PSH ID	5768
Pixiv Encyclopedia ID	クロム
Probes And Drugs ID	PD061009
PubChem CID	23976
RKD thesaurus ID	92666
RxNorm ID	2496
STW Thesaurus for Economics ID	14295-6
Spanish Cultural Heritage thesauri ID	materias/1000922
Spanish Vikidia ID	Cromo
Store norske leksikon ID	krom
Treccani ID	cromo
U.S. National Archives Identifier	10646811
UK Archival Thesaurus ID	f2/mt225/4347/7866
UK Parliament thesaurus ID	9168
UNII	0R0008Q3JB
USGS Thesaurus ID	1429
WikiSkripta ID	12126
Wolfram Language entity code	Entity["Mineral", "Chromium"]
WordNet 3.1 Synset ID	14659270-n
YSO ID	20200
ZVG number	8190
aitheantóir LoC	sh85025350
uimhir CAS	7440-47-3

Cróimiam (Cr)

Physical Property

Chemical Property

eile

Isotopes of Chromium

41Cr

42Cr

43Cr

44Cr

45Cr

46Cr

47Cr

48Cr

49Cr

50Cr

51Cr

52Cr

53Cr

54Cr

55Cr

56Cr

57Cr

58Cr

59Cr

60Cr

61Cr

62Cr

63Cr

64Cr

65Cr

66Cr

67Cr

68Cr

69Cr

70Cr

stair

foinse

Nuclear Screening Constants

⁴¹Cr

⁴²Cr

⁴³Cr

⁴⁴Cr

⁴⁵Cr

⁴⁶Cr

⁴⁷Cr

⁴⁸Cr

⁴⁹Cr

⁵⁰Cr

⁵¹Cr

⁵²Cr

⁵³Cr

⁵⁴Cr

⁵⁵Cr

⁵⁶Cr

⁵⁷Cr

⁵⁸Cr

⁵⁹Cr

⁶⁰Cr

⁶¹Cr

⁶²Cr

⁶³Cr

⁶⁴Cr

⁶⁵Cr

⁶⁶Cr

⁶⁷Cr

⁶⁸Cr

⁶⁹Cr

⁷⁰Cr