Kromoa (Cr)

24 zenbaki atomikoa duen elementu kimikoa

Atomic Number	24
Atomic Weight	51.9961
masa-zenbaki	52

Group	6
Period	4
Block	d

protoi	24 p⁺
neutroi	28 n⁰
elektroi	24 e^-

Animated Bohrren eredu atomikoa of Cr (Kromoa)

Propietate Fisiko

Erradio Atomiko	140 pm 233 pm
bolumen molar	7,23 cm³/mol
Erradio Kobalente	122 pm 111 pm 103 pm 140 pm 139 pm
Metallic Radius	119 pm 128 pm
Erradio ioniko	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 Waalsen erradio	205 pm 206 pm 225 pm 302,3 pm
dentsitatea	7,15 g/cm³ 6.300 kg/m³

Magnitude Fisiko

{ERROR}

energia

proton affinity	791,3 kJ/mol
Afinitate elektroniko	0,666 eV/particle
ionizazio energia	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

Irakite-entalpia	342 kJ/mol
urtze-entalpia	21 kJ/mol
formazio entalpia estandarra	397,48 kJ/mol
elektroi

elektroi geruza	2, 8, 13, 1

balentzia-elektroi	1 ⓘ

electron configuration	[Ar] 3d⁵ 4s¹ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹

Oxidazio-egoera	-4, -2, -1, 0, 1, 2, 3, 4, 5, 6
Elektronegatibotasun	9,77 eV/particle 0.1313053 1.66
Electrophilicity Index	1,1319177597467263 eV/particle
materiaren funtsezko egoera

materiaren egoera
materiaren egoera gaseoso
Boiling Point	2.944,15 K
Melting Point	2.180,15 K
critical pressure
critical temperature
Puntu hirukoitz
appearance
kolore	Black #808090 #8a99c7 #8a99c7
appearance	silvery metallic
errefrakzio-indize
thermodynamic material property
Thermal Conductivity	93,9 W/(m K)
Bero-dilatazio	0,0000049 1/K
molar heat capacity	23,35 J/(mol K)
Specific Heat Capacity	0,449 J/(g⋅K)
indize adiabatiko
electrical properties
type	Conductor
Eroankortasun elektriko	7,9 MS/m
Erresistibitate elektriko	0,00000013 Ω*m
Supereroankortasun
Magnetismo
type	antiferromagnetic
suszeptibilitate magnetiko (Mass)	0,0000000445 m³/Kg
suszeptibilitate magnetiko (Molar)	0,000000002314 m³/mol
suszeptibilitate magnetiko (Volume)	0,0003177
magnetic ordering
Curieren tenperatura
Néel temperature	393 K
egitura
Crystal Structure	{ERROR}
lattice constant	2,88 Å
Lattice Angles	π/2, π/2, π/2
materialen propietate mekaniko
Gogortasun	1.120 MPa 8,5 MPa 1.060 MPa
konprimagarritasun-modulu	160 GPa
Zizaila modulua	115 GPa
Youngen modulu	279 GPa
Poissonen modulu	0,21
Soinuaren lastertasun	5.940 m/s
classification
Category	Actinides, 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

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Gas Basicity	768,4 kJ/mol
polarizability	83 ± 12 a₀
C6 Dispersion Coefficient	602 a₀ 709 a₀
allotrope
Neutron cross section	3,1
Neutron Mass Absorption	0,0021
zenbaki kuantiko	7S3
talde espazial	229 (Im_3m)

Isotopes of Chromium

Stable Isotopes	3
Unstable Isotopes	27
Natural Isotopes	4

⁴¹Cr

masa-zenbaki	41
neutron number	17
Atomo-Masa Erlatibo	41,021911 ± 0,000429 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	3/2
nuclear quadrupole moment
aurkikuntza-data
parity	+

decay mode	intensity
p (proton emission)

⁴²Cr

masa-zenbaki	42
neutron number	18
Atomo-Masa Erlatibo	42,007579 ± 0,000322 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	13,3 ± 1 ms
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1996
parity	+

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

⁴³Cr

masa-zenbaki	43
neutron number	19
Atomo-Masa Erlatibo	42,997885 ± 0,000215 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	21,1 ± 0,3 ms
spin	3/2
nuclear quadrupole moment
aurkikuntza-data	1992
parity	+

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

masa-zenbaki	44
neutron number	20
Atomo-Masa Erlatibo	43,985591 ± 0,000055 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	42,8 ± 0,6 ms
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1987
parity	+

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

⁴⁵Cr

masa-zenbaki	45
neutron number	21
Atomo-Masa Erlatibo	44,97905 ± 0,000038 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	60,9 ± 0,4 ms
spin	7/2
nuclear quadrupole moment
aurkikuntza-data	1974
parity	-

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

⁴⁶Cr

masa-zenbaki	46
neutron number	22
Atomo-Masa Erlatibo	45,968360969 ± 0,000012295 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	224,3 ± 1,3 ms
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1972
parity	+

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

⁴⁷Cr

masa-zenbaki	47
neutron number	23
Atomo-Masa Erlatibo	46,962894995 ± 0,000005578 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	461,6 ± 1,5 ms
spin	3/2
nuclear quadrupole moment
aurkikuntza-data	1972
parity	-

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

⁴⁸Cr

masa-zenbaki	48
neutron number	24
Atomo-Masa Erlatibo	47,954029431 ± 0,000007848 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	21,56 ± 0,03 h
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1952
parity	+

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

⁴⁹Cr

masa-zenbaki	49
neutron number	25
Atomo-Masa Erlatibo	48,95133372 ± 0,000002363 Da
g-factor	0,1904 ± 0,0012
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	42,3 ± 0,1 m
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	1942
parity	-

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

⁵⁰Cr

masa-zenbaki	50
neutron number	26
Atomo-Masa Erlatibo	49,946042209 ± 0,0000001 Da
g-factor	0
natural abundance	4,345 ± 0,013
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1930
parity	+

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

⁵¹Cr

masa-zenbaki	51
neutron number	27
Atomo-Masa Erlatibo	50,944765388 ± 0,000000178 Da
g-factor	0,26685714285714 ± 0,0014285714285714
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	27,7015 ± 0,0011 d
spin	7/2
nuclear quadrupole moment
aurkikuntza-data	1940
parity	-

decay mode	intensity
ϵ (electron capture)	100%

⁵²Cr

masa-zenbaki	52
neutron number	28
Atomo-Masa Erlatibo	51,940504714 ± 0,00000012 Da
g-factor	0
natural abundance	83,789 ± 0,018
desintegrazio erradioaktibo	isotopo egonkor
Semidesintegrazio-periodo	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1923
parity	+

⁵³Cr

masa-zenbaki	53
neutron number	29
Atomo-Masa Erlatibo	52,940646304 ± 0,000000124 Da
g-factor
natural abundance	9,501 ± 0,017
desintegrazio erradioaktibo	isotopo egonkor
Semidesintegrazio-periodo	Not Radioactive ☢️
spin	3/2
nuclear quadrupole moment	−0,15 ± 0,05
aurkikuntza-data	1930
parity	-

⁵⁴Cr

masa-zenbaki	54
neutron number	30
Atomo-Masa Erlatibo	53,938877359 ± 0,000000142 Da
g-factor	0
natural abundance	2,365 ± 0,007
desintegrazio erradioaktibo	isotopo egonkor
Semidesintegrazio-periodo	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1930
parity	+

⁵⁵Cr

masa-zenbaki	55
neutron number	31
Atomo-Masa Erlatibo	54,940836637 ± 0,000000245 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	3,497 ± 0,003 m
spin	3/2
nuclear quadrupole moment
aurkikuntza-data	1952
parity	-

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

⁵⁶Cr

masa-zenbaki	56
neutron number	32
Atomo-Masa Erlatibo	55,940648977 ± 0,00000062 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	5,94 ± 0,1 m
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1960
parity	+

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

⁵⁷Cr

masa-zenbaki	57
neutron number	33
Atomo-Masa Erlatibo	56,943612112 ± 0,000002 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	21,1 ± 1 s
spin	3/2
nuclear quadrupole moment
aurkikuntza-data	1978
parity

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

⁵⁸Cr

masa-zenbaki	58
neutron number	34
Atomo-Masa Erlatibo	57,944184501 ± 0,0000032 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	7 ± 0,3 s
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1980
parity	+

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

⁵⁹Cr

masa-zenbaki	59
neutron number	35
Atomo-Masa Erlatibo	58,948345426 ± 0,00000072 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	1.050 ± 90 ms
spin	1/2
nuclear quadrupole moment	0
aurkikuntza-data	1980
parity	-

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

⁶⁰Cr

masa-zenbaki	60
neutron number	36
Atomo-Masa Erlatibo	59,949641656 ± 0,0000012 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	490 ± 10 ms
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1980
parity	+

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

⁶¹Cr

masa-zenbaki	61
neutron number	37
Atomo-Masa Erlatibo	60,95437813 ± 0,000002 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	243 ± 9 ms
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	1985
parity	-

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

⁶²Cr

masa-zenbaki	62
neutron number	38
Atomo-Masa Erlatibo	61,95614292 ± 0,0000037 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	206 ± 12 ms
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1985
parity	+

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

⁶³Cr

masa-zenbaki	63
neutron number	39
Atomo-Masa Erlatibo	62,961161 ± 0,000078 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	129 ± 2 ms
spin	1/2
nuclear quadrupole moment	0
aurkikuntza-data	1992
parity	-

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

⁶⁴Cr

masa-zenbaki	64
neutron number	40
Atomo-Masa Erlatibo	63,963886 ± 0,000322 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	43 ± 1 ms
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1992
parity	+

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

⁶⁵Cr

masa-zenbaki	65
neutron number	41
Atomo-Masa Erlatibo	64,969608 ± 0,000215 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	27,5 ± 2,1 ms
spin	1/2
nuclear quadrupole moment	0
aurkikuntza-data	1997
parity	-

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

⁶⁶Cr

masa-zenbaki	66
neutron number	42
Atomo-Masa Erlatibo	65,973011 ± 0,000322 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	23,8 ± 1,8 ms
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1997
parity	+

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

⁶⁷Cr

masa-zenbaki	67
neutron number	43
Atomo-Masa Erlatibo	66,979313 ± 0,000429 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	1/2
nuclear quadrupole moment	0
aurkikuntza-data	1997
parity	-

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

⁶⁸Cr

masa-zenbaki	68
neutron number	44
Atomo-Masa Erlatibo	67,983156 ± 0,000537 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	2009
parity	+

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

⁶⁹Cr

masa-zenbaki	69
neutron number	45
Atomo-Masa Erlatibo	68,989662 ± 0,000537 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	7/2
nuclear quadrupole moment
aurkikuntza-data	2013
parity	+

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

⁷⁰Cr

masa-zenbaki	70
neutron number	46
Atomo-Masa Erlatibo	69,993945 ± 0,000644 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	2013
parity	+

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

historia

aurkitzailea edo asmatzailea	Louis Vauquelin
aurkikuntzaren lekua	France
aurkikuntza-data	1797
etimologia	Greek: chrôma (color).
pronunciation	KROH-mi-em (ingelesa)

source

Abundance
Abundance in Earth's crust	102 mg/kg
natural abundance (ozeano)	0,0003 mg/L
natural abundance (gizakiaren gorputza)	0,000003 %
natural abundance (Meteoroide)	0,3 %
natural abundance (Eguzkia)	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

Kromoa on ChemicalAid

Kromoa (Cr)

Propietate Fisiko

Magnitude Fisiko

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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

historia

source

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