Cóbalt (Co)

chemical element with symbol Co and atomic number 27

Atomic Number	27
Atomic Weight	58.933194
Núicléónuimhir	59

Group	9
Period	4
Block	d

prótón	27 p⁺
neodrón	32 n⁰
leictreon	27 e^-

Physical Property

Ga Adamhach	135 pm 233 pm
molar volume	6.7 cm³/mol
covalent radius	111 pm 103 pm 96 pm 137 pm 138 pm
Metallic Radius	116 pm 125 pm
ionic radius	58 pm 67 pm 65 pm 74.5 pm 90 pm 54.5 pm 61 pm 40 pm 53 pm
Crystal Radius	72 pm 81 pm 79 pm 88.5 pm 104 pm 68.5 pm 75 pm 54 pm 67 pm
Van der Waals radius	200 pm 200 pm 223 pm 287.2 pm
dlús	8.86 g/cm³ 7,750 kg/m³

Chemical Property

fuinneamh

proton affinity	742.7 kJ/mol
electron affinity	0.66225646 eV/particle
ionization energy	7.88101 eV/particle 17.0844 eV/particle 33.5 eV/particle 51.27 eV/particle 79.5 eV/particle 102 eV/particle 129 eV/particle 157.8 eV/particle 186.14 eV/particle 275.4 eV/particle 305.32 eV/particle 336.15 eV/particle 378.55 eV/particle 410 eV/particle 441.1 eV/particle 511.96 eV/particle 546.588 eV/particle 1,397.2 eV/particle 1,504.5 eV/particle 1,606 eV/particle 1,724 eV/particle 1,844 eV/particle 1,960.83 eV/particle 2,119.4 eV/particle 2,218.876 eV/particle 9,544.183 eV/particle 10,012.122 eV/particle

enthalpy of vaporization	389.1 kJ/mol
enthalpy of fusion	15.48 kJ/mol
eantalpacht chaighdeánach an fhoirmithe	426.7 kJ/mol
leictreon

electron shell	2, 8, 15, 2

Fiúsleictreon	2 ⓘ

cumraíocht leictreon	[Ar] 3d⁷ 4s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁷ 4s²

Staid ocsaídiúcháine	-3, -1, 0, 1, 2, 3, 4, 5
Leictridhiúltacht	10.86 eV/particle 0.1432363 1.88
Electrophilicity Index	1.2638504937543713 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point	3,200.15 K
Melting Point	1,768.15 K
critical pressure
critical temperature
triple point
appearance
dath	Gray #ff1493 #f090a0 #f090a0
appearance	hard lustrous gray metal
Comhéifeacht athraonta
thermodynamic material property
Thermal Conductivity	100 W/(m K)
Forbairt theirmeach	0.000013 1/K
molar heat capacity	24.81 J/(mol K)
Specific Heat Capacity	0.421 J/(g⋅K)
Cóimheas saintoilleadh teasa
electrical properties
type	Conductor
electrical conductivity	17 MS/m
Friotachas	0.00000006000000000002 Ω*m
Forsheoltacht
Maighnéadas
type	ferromagnetic
So-ghabhálacht mhaighnéadach (Mass)
So-ghabhálacht mhaighnéadach (Molar)
So-ghabhálacht mhaighnéadach (Volume)
magnetic ordering
Teocht Curie	1,394 K
Néel temperature
struchtúr
Crystal Structure	Simple Hexagonal (HEX)
lattice constant	2.51 Å
Lattice Angles	π/2, π/2, 2 π/3
airíonna meicniúla
Cruas	700 MPa 5 MPa 1,043 MPa
Modal toirte	180 GPa
modal fiartha	75 GPa
modal Young	209 GPa
Cóimheas Poisson	0.31
luas forleata fuaime	4,720 m/s
aicmiúchán
Category	Transition metals, Transition metals
CAS Group	VIIIA
IUPAC Group	VIII
Glawe Number	70
Mendeleev Number	63
Pettifor Number	64
Geochemical Class	first series transition metal
Goldschmidt classification	siderophile

eile

Gas Basicity	719.8 kJ/mol
polarizability	55 ± 4 a₀
C6 Dispersion Coefficient	408 a₀ 461 a₀
allotrope
Crosghearradh	37.2
Neutron Mass Absorption	0.021
Uimhir chandamach	4F9/2
space group	194 (P63/mmc)

Isotopes of Cobalt

Stable Isotopes	1
Unstable Isotopes	31
Natural Isotopes	1

⁴⁷Co

Núicléónuimhir	47
neutron number	20
Mais Adamhach Choibhneasta	47.011401 ± 0.000644 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh
Paireacht	-

decay mode	intensity
p (proton emission)

⁴⁸Co

Núicléónuimhir	48
neutron number	21
Mais Adamhach Choibhneasta	48.001857 ± 0.000537 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	6
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh
Paireacht	+

decay mode	intensity
p (proton emission)

⁴⁹Co

Núicléónuimhir	49
neutron number	22
Mais Adamhach Choibhneasta	48.989501 ± 0.000537 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh
Paireacht	-

decay mode	intensity
p (proton emission)

⁵⁰Co

Núicléónuimhir	50
neutron number	23
Mais Adamhach Choibhneasta	49.981117 ± 0.000135 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	38.8 ± 0.2 ms
Guairne	6
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1987
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	70.5%
2p (2-proton emission)

⁵¹Co

Núicléónuimhir	51
neutron number	24
Mais Adamhach Choibhneasta	50.970647 ± 0.000052 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	68.8 ± 1.9 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1987
Paireacht	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	3.8%

⁵²Co

Núicléónuimhir	52
neutron number	25
Mais Adamhach Choibhneasta	51.963130224 ± 0.000005669 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	111.7 ± 2.1 ms
Guairne	6
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1987
Paireacht	+

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

⁵³Co

Núicléónuimhir	53
neutron number	26
Mais Adamhach Choibhneasta	52.954203278 ± 0.000001854 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	244.6 ± 2.8 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1970
Paireacht	-

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

⁵⁴Co

Núicléónuimhir	54
neutron number	27
Mais Adamhach Choibhneasta	53.948459075 ± 0.00000038 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	193.27 ± 0.06 ms
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1952
Paireacht	+

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

⁵⁵Co

Núicléónuimhir	55
neutron number	28
Mais Adamhach Choibhneasta	54.941996416 ± 0.000000434 Da
G-fhachtóir	1.3777142857143 ± 0.00085714285714286
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	17.53 ± 0.03 h
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1938
Paireacht	-

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

⁵⁶Co

Núicléónuimhir	56
neutron number	29
Mais Adamhach Choibhneasta	55.939838032 ± 0.00000051 Da
G-fhachtóir	0.9625 ± 0.0025
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	77.236 ± 0.026 d
Guairne	4
nuclear quadrupole moment	0.25 ± 0.09
dáta fionnachtana nó tionscnaimh	1941
Paireacht	+

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

⁵⁷Co

Núicléónuimhir	57
neutron number	30
Mais Adamhach Choibhneasta	56.936289819 ± 0.000000553 Da
G-fhachtóir	1.3485714285714 ± 0.0028571428571429
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	271.811 ± 0.032 d
Guairne	7/2
nuclear quadrupole moment	0.54 ± 0.1
dáta fionnachtana nó tionscnaimh	1941
Paireacht	-

decay mode	intensity
ϵ (electron capture)	100%

⁵⁸Co

Núicléónuimhir	58
neutron number	31
Mais Adamhach Choibhneasta	57.935751292 ± 0.000001237 Da
G-fhachtóir	2.022 ± 0.004
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	70.844 ± 0.02 d
Guairne	2
nuclear quadrupole moment	0.23 ± 0.03
dáta fionnachtana nó tionscnaimh	1941
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
e⁺ (positron emission)	14.79%
ϵ (electron capture)	85.21%

⁵⁹Co

Núicléónuimhir	59
neutron number	32
Mais Adamhach Choibhneasta	58.933193524 ± 0.000000426 Da
G-fhachtóir
natural abundance	100
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	7/2
nuclear quadrupole moment	0.42 ± 0.03
dáta fionnachtana nó tionscnaimh	1923
Paireacht	-

⁶⁰Co

Núicléónuimhir	60
neutron number	33
Mais Adamhach Choibhneasta	59.933815536 ± 0.000000433 Da
G-fhachtóir	0.7598 ± 0.0016
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	5.2714 ± 0.0006 y
Guairne	5
nuclear quadrupole moment	0.46 ± 0.06
dáta fionnachtana nó tionscnaimh	1941
Paireacht	+

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

⁶¹Co

Núicléónuimhir	61
neutron number	34
Mais Adamhach Choibhneasta	60.932476031 ± 0.000000901 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.649 ± 0.005 h
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1947
Paireacht	-

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

⁶²Co

Núicléónuimhir	62
neutron number	35
Mais Adamhach Choibhneasta	61.934058198 ± 0.00001994 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.54 ± 0.1 m
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1949
Paireacht

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

⁶³Co

Núicléónuimhir	63
neutron number	36
Mais Adamhach Choibhneasta	62.93359963 ± 0.000019941 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	26.9 ± 0.4 s
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1960
Paireacht	-

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

⁶⁴Co

Núicléónuimhir	64
neutron number	37
Mais Adamhach Choibhneasta	63.935810176 ± 0.000021476 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	300 ± 30 ms
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1969
Paireacht	+

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

⁶⁵Co

Núicléónuimhir	65
neutron number	38
Mais Adamhach Choibhneasta	64.936462071 ± 0.000002235 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.16 ± 0.03 s
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1978
Paireacht

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

⁶⁶Co

Núicléónuimhir	66
neutron number	39
Mais Adamhach Choibhneasta	65.939442943 ± 0.000015 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	194 ± 17 ms
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1985
Paireacht	+

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

⁶⁷Co

Núicléónuimhir	67
neutron number	40
Mais Adamhach Choibhneasta	66.940609625 ± 0.000006917 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	329 ± 28 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1985
Paireacht	-

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

⁶⁸Co

Núicléónuimhir	68
neutron number	41
Mais Adamhach Choibhneasta	67.944559401 ± 0.000004142 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	200 ± 20 ms
Guairne	7
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1985
Paireacht	-

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

⁶⁹Co

Núicléónuimhir	69
neutron number	42
Mais Adamhach Choibhneasta	68.945909 ± 0.000092 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	180 ± 20 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1985
Paireacht	-

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

⁷⁰Co

Núicléónuimhir	70
neutron number	43
Mais Adamhach Choibhneasta	69.9500534 ± 0.0000118 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	508 ± 7 ms
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1998
Paireacht	+

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

⁷¹Co

Núicléónuimhir	71
neutron number	44
Mais Adamhach Choibhneasta	70.952366923 ± 0.00049923 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	80 ± 3 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1992
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	3%

⁷²Co

Núicléónuimhir	72
neutron number	45
Mais Adamhach Choibhneasta	71.956736 ± 0.000322 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	51.5 ± 0.3 ms
Guairne	6
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1992
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	4%
2n (2-neutron emission)

⁷³Co

Núicléónuimhir	73
neutron number	46
Mais Adamhach Choibhneasta	72.959238 ± 0.000322 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	42 ± 0.8 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1995
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	6%
2n (2-neutron emission)

⁷⁴Co

Núicléónuimhir	74
neutron number	47
Mais Adamhach Choibhneasta	73.963993 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	31.3 ± 1.3 ms
Guairne	7
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1995
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	18%
2n (2-neutron emission)

⁷⁵Co

Núicléónuimhir	75
neutron number	48
Mais Adamhach Choibhneasta	74.967192 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	26.5 ± 1.2 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1995
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	16%
2n (2-neutron emission)

⁷⁶Co

Núicléónuimhir	76
neutron number	49
Mais Adamhach Choibhneasta	75.972453 ± 0.000537 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	23 ± 6 ms
Guairne	8
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2010
Paireacht	-

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

⁷⁷Co

Núicléónuimhir	77
neutron number	50
Mais Adamhach Choibhneasta	76.976479 ± 0.000644 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	15 ± 6 ms
Guairne	7/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2014
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)
3n (3-neutron emission)

⁷⁸Co

Núicléónuimhir	78
neutron number	51
Mais Adamhach Choibhneasta	77.983553 ± 0.000751 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	2017
Paireacht

decay mode	intensity
β⁻ (β⁻ decay)

stair

fionnachtaí nó aireagóir	George Brandt
áit ar tháinig air/uirthi	Sweden
dáta fionnachtana nó tionscnaimh	1739
Sanasaíocht	German: kobold (goblin).
pronunciation	KO-bolt (Béarla)

foinse

Abundance
Abundance in Earth's crust	25 mg/kg
natural abundance (aigéan)	0.00002 mg/L
natural abundance (corp an duine)	0.000002 %
natural abundance (dreigeoideach)	0.059 %
natural abundance (An Ghrian)	0.0004 %
Abundance in Universe	0.0003 %

Nuclear Screening Constants

1	s	0.6332
2	p	3.9076
2	s	7.595
3	d	15.1446
3	p	13.5654
3	s	12.6777
4	s	21.4236

Cóbalt on ChemicalAid

AGROVOC ID	c_1702
Art & Architecture Thesaurus ID	300221155
Australian Educational Vocabulary ID	scot/3511
BNCF Thesaurus ID	22939
Bibliothèque nationale de France ID	119794179
Brockhaus Enzyklopädie online ID	kobalt
CAB ID	105528
CA PROP 65 ID	cobalt-metal-powder
CPV Supplementary	AA16
Canadian Encyclopedia article ID	cobalt
ChEBI ID	27638
Common Procurement Vocabulary	14733000
DSSTOX compound identifier	DTXCID9011040
DSSTox substance ID	DTXSID1031040
DrugBank ID	14574
ECHA Substance Infocard ID	100.028.325
Encyclopædia Britannica Online ID	science/cobalt-chemical-element
Encyclopædia Universalis ID	cobalt
EuroVoc ID	6018
Freebase ID	/m/025tkrf
French Vikidia ID	Cobalt
GEMET ID	1532
Golden ID	Cobalt-RGEZNX
Great Russian Encyclopedia Online ID	2075823
Grove Art Online ID	T2071458
HCIS ID	1033
HSDB ID	519
ICSC ID	0782
ID GND	4070047-1
IEDB Epitope ID	114073
InChIKey	GUTLYIVDDKVIGB-UHFFFAOYSA-N
KBpedia ID	Cobalt
Latvian National Encyclopedia Online ID	112080
MeSH descriptor ID	D003035
NALT ID	27388
NDF-RT ID	N0000022936
NDL Authority ID	00566072
NKCR AUT ID	ph543047
National Library of Israel J9U ID	987007284052205171
OmegaWiki Defined Meaning	645
OpenAlex ID	C515602321
PSH ID	5779
Probes And Drugs ID	PD094484
RxNorm ID	1310300
Spanish Cultural Heritage thesauri ID	materias/1010032
Spanish Vikidia ID	Cobalto
Store norske leksikon ID	kobolt
Treccani ID	cobalto
UK Parliament thesaurus ID	285732
UNII	3G0H8C9362
USGS Thesaurus ID	1433
WikiSkripta ID	30617
WordNet 3.1 Synset ID	14659468-n
YSO ID	15221
Yle topic ID	18-14370
ZVG number	7270
aitheantóir LoC	sh85027513
uimhir CAS	7440-48-4

Cóbalt (Co)

Physical Property

Chemical Property

eile

Isotopes of Cobalt

47Co

48Co

49Co

50Co

51Co

52Co

53Co

54Co

55Co

56Co

57Co

58Co

59Co

60Co

61Co

62Co

63Co

64Co

65Co

66Co

67Co

68Co

69Co

70Co

71Co

72Co

73Co

74Co

75Co

76Co

77Co

78Co

stair

foinse

Nuclear Screening Constants

⁴⁷Co

⁴⁸Co

⁴⁹Co

⁵⁰Co

⁵¹Co

⁵²Co

⁵³Co

⁵⁴Co

⁵⁵Co

⁵⁶Co

⁵⁷Co

⁵⁸Co

⁵⁹Co

⁶⁰Co

⁶¹Co

⁶²Co

⁶³Co

⁶⁴Co

⁶⁵Co

⁶⁶Co

⁶⁷Co

⁶⁸Co

⁶⁹Co

⁷⁰Co

⁷¹Co

⁷²Co

⁷³Co

⁷⁴Co

⁷⁵Co

⁷⁶Co

⁷⁷Co

⁷⁸Co