Kripton (Kr)

chemical element with symbol Kr and atomic number 36; rare gas

Atomic Number	36
Atomic Weight	83.798
Massagetal	84

Group	18
Period	4
Block	p

proton	36 p⁺
neutron	48 n⁰
elektron	36 e^-

Physical Property

Atoomradius	212 pm
molar volume	32,2 cm³/mol
Covalent Radius	117 pm 121 pm 108 pm 116 pm
Metallic Radius
Ioonradius
Crystal Radius
Van der Waals radius	202 pm 202 pm 215 pm 414,1 pm
density	0,003425 g/cm³

Chemical Property

energie

proton affinity	424,6 kJ/mol
electron affinity
ionization energy	13,9996049 eV/particle 24,35984 eV/particle 35,67 eV/particle 50,85 eV/particle 64,69 eV/particle 78,49 eV/particle 109,13 eV/particle 125,8024 eV/particle 233 eV/particle 268 eV/particle 308 eV/particle 350 eV/particle 391 eV/particle 446 eV/particle 492 eV/particle 540 eV/particle 591 eV/particle 640 eV/particle 785 eV/particle 831,64 eV/particle 882,8 eV/particle 945 eV/particle 999 eV/particle 1 042 eV/particle 1 155 eV/particle 1 205,233 eV/particle 2 928,9 eV/particle 3 072 eV/particle 3 228 eV/particle 3 380 eV/particle 3 584 eV/particle 3 752 eV/particle 3 971 eV/particle 4 109,083 eV/particle 17 296,42 eV/particle 17 936,208 eV/particle

Verdampingswarmte	9,05 kJ/mol
smeltingswarmte
Vormingsentalpie
elektron

Elektronskil	2, 8, 18, 8

Valenselektrone	8 ⓘ

elektronkonfigurasie	[Ar] 3d¹⁰ 4s² 4p⁶ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶

Oksidasietoestand	0, 1, 2
Elektronegatiwiteit	17,54 eV/particle 0.2584813
Electrophilicity Index
fundamental state of matter

phase of matter	Gas
gaseous state of matter	Monoatomic
Boiling Point	119,735 K
Melting Point	115,78 K
critical pressure	5,525 MPa
critical temperature	209,48 K
triple point	115,775 K 73,53 kPa
appearance
kleur	Colorless #ff1493 #5cb8d1 #5cb8d1
appearance	colorless gas, exhibiting a whitish glow in a high electric field
Brekingsindeks	1,000427
thermodynamic material property
Thermal Conductivity	0,0095 W/(m K)
thermal expansion
molar heat capacity	20,786 J/(mol K)
Specific Heat Capacity	0,248 J/(g⋅K)
heat capacity ratio	5/3
electrical properties
type
Geleidingsvermoë
Elektriese resistiwiteit
superconductivity
Magnetisme
type	diamagnetic
magnetic susceptibility (Mass)	-0,0000000044 m³/Kg
magnetic susceptibility (Molar)	-0,000000000369 m³/mol
magnetic susceptibility (Volume)	-0,0000000165
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	Face Centered Cubic (FCC)
lattice constant	5,72 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness
Massamodulus
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank	1 120 m/s
classification
Category	Noble gases, Noble gases
CAS Group	VIII
IUPAC Group	VIIIA
Glawe Number	4
Mendeleev Number	115
Pettifor Number	4
Geochemical Class	volatile
Goldschmidt classification	atmophile

other

Gas Basicity	402,4 kJ/mol
polarizability	16,78 ± 0,02 a₀
C6 Dispersion Coefficient	130 a₀ 136 a₀
allotrope
Neutron cross section	25
Neutron Mass Absorption	0,013
quantum number	1S0
Ruimtegroep	225 (Fm_3m)

Isotopes of Krypton

Stable Isotopes	4
Unstable Isotopes	31
Natural Isotopes	6

⁶⁷Kr

Massagetal	67
neutron number	31
Relative Atomic Mass	66,983305 ± 0,000455 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	7,4 ± 2,9 ms
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	2016
parity	-

decay mode	intensity
2p (2-proton emission)	37%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

⁶⁸Kr

Massagetal	68
neutron number	32
Relative Atomic Mass	67,972489 ± 0,000537 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	21,6 ± 3,3 ms
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	2016
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)	90%
p (proton emission)

⁶⁹Kr

Massagetal	69
neutron number	33
Relative Atomic Mass	68,965496 ± 0,000322 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	27,9 ± 0,8 ms
spin	5/2
nuclear quadrupole moment
ontdekkingsdatum	1995
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	94%

⁷⁰Kr

Massagetal	70
neutron number	34
Relative Atomic Mass	69,955877 ± 0,000215 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	45 ± 0,14 ms
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1995
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	1.3%

⁷¹Kr

Massagetal	71
neutron number	35
Relative Atomic Mass	70,950265695 ± 0,000138238 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	98,8 ± 0,3 ms
spin	5/2
nuclear quadrupole moment
ontdekkingsdatum	1981
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	2.1%

⁷²Kr

Massagetal	72
neutron number	36
Relative Atomic Mass	71,942092406 ± 0,0000086 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	17,16 ± 0,18 s
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1973
parity	+

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

⁷³Kr

Massagetal	73
neutron number	37
Relative Atomic Mass	72,939289193 ± 0,000007061 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	27,3 ± 1 s
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	1972
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.25%

⁷⁴Kr

Massagetal	74
neutron number	38
Relative Atomic Mass	73,933084016 ± 0,000002161 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	11,5 ± 0,11 m
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1960
parity	+

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

⁷⁵Kr

Massagetal	75
neutron number	39
Relative Atomic Mass	74,930945744 ± 0,0000087 Da
g-factor	-0,2124 ± 0,0016
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	4,6 ± 0,07 m
spin	5/2
nuclear quadrupole moment	1,137 ± 0,013
ontdekkingsdatum	1960
parity	+

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

⁷⁶Kr

Massagetal	76
neutron number	40
Relative Atomic Mass	75,925910743 ± 0,000004308 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	14,8 ± 0,1 h
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1954
parity	+

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

⁷⁷Kr

Massagetal	77
neutron number	41
Relative Atomic Mass	76,924669999 ± 0,0000021 Da
g-factor	-0,2332 ± 0,0012
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	72,6 ± 0,9 m
spin	5/2
nuclear quadrupole moment	0,948 ± 0,01
ontdekkingsdatum	1948
parity	+

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

⁷⁸Kr

Massagetal	78
neutron number	42
Relative Atomic Mass	77,920366341 ± 0,000000329 Da
g-factor	0
natural abundance	0,355 ± 0,003
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1920
parity	+

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

⁷⁹Kr

Massagetal	79
neutron number	43
Relative Atomic Mass	78,920082919 ± 0,000003736 Da
g-factor	1,072 ± 0,004
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	35,04 ± 0,1 h
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	1948
parity	-

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

⁸⁰Kr

Massagetal	80
neutron number	44
Relative Atomic Mass	79,91637794 ± 0,000000745 Da
g-factor	0
natural abundance	2,286 ± 0,01
radioaktiwiteit	Stabiele isotoop
Halfleeftyd	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1920
parity	+

⁸¹Kr

Massagetal	81
neutron number	45
Relative Atomic Mass	80,916589703 ± 0,000001152 Da
g-factor	-0,25914285714286 ± 0,00057142857142857
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	229 ± 11 ky
spin	7/2
nuclear quadrupole moment	0,644 ± 0,004
ontdekkingsdatum	1950
parity	+

decay mode	intensity
ϵ (electron capture)	100%

⁸²Kr

Massagetal	82
neutron number	46
Relative Atomic Mass	81,91348115368 ± 0,00000000591 Da
g-factor	0
natural abundance	11,593 ± 0,031
radioaktiwiteit	Stabiele isotoop
Halfleeftyd	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1920
parity	+

⁸³Kr

Massagetal	83
neutron number	47
Relative Atomic Mass	82,914126516 ± 0,000000009 Da
g-factor	-0,21571777777778 ± 0,00000066666666666667
natural abundance	11,5 ± 0,019
radioaktiwiteit	Stabiele isotoop
Halfleeftyd	Not Radioactive ☢️
spin	9/2
nuclear quadrupole moment	0,259 ± 0,001
ontdekkingsdatum	1920
parity	+

⁸⁴Kr

Massagetal	84
neutron number	48
Relative Atomic Mass	83,91149772708 ± 0,0000000041 Da
g-factor	0
natural abundance	56,987 ± 0,015
radioaktiwiteit	Stabiele isotoop
Halfleeftyd	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1920
parity	+

⁸⁵Kr

Massagetal	85
neutron number	49
Relative Atomic Mass	84,91252726 ± 0,000002147 Da
g-factor	-0,22344444444444 ± 0,000088888888888889
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	10,728 ± 0,007 y
spin	9/2
nuclear quadrupole moment	0,443 ± 0,003
ontdekkingsdatum	1940
parity	+

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

⁸⁶Kr

Massagetal	86
neutron number	50
Relative Atomic Mass	85,91061062468 ± 0,00000000399 Da
g-factor	0
natural abundance	17,279 ± 0,041
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1920
parity	+

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

⁸⁷Kr

Massagetal	87
neutron number	51
Relative Atomic Mass	86,913354759 ± 0,000000264 Da
g-factor	-0,4088 ± 0,0008
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	76,3 ± 0,5 m
spin	5/2
nuclear quadrupole moment	-0,3 ± 0,003
ontdekkingsdatum	1940
parity	+

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

⁸⁸Kr

Massagetal	88
neutron number	52
Relative Atomic Mass	87,914447879 ± 0,0000028 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	2,825 ± 0,019 h
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1939
parity	+

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

⁸⁹Kr

Massagetal	89
neutron number	53
Relative Atomic Mass	88,917835449 ± 0,0000023 Da
g-factor	-0,22 ± 0,002
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	3,15 ± 0,04 m
spin	3/2
nuclear quadrupole moment	0,166 ± 0,002
ontdekkingsdatum	1940
parity	+

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

⁹⁰Kr

Massagetal	90
neutron number	54
Relative Atomic Mass	89,919527929 ± 0,000002 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	32,32 ± 0,09 s
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1951
parity	+

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

⁹¹Kr

Massagetal	91
neutron number	55
Relative Atomic Mass	90,923806309 ± 0,0000024 Da
g-factor	-0,2332 ± 0,0008
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	8,57 ± 0,04 s
spin	5/2
nuclear quadrupole moment	0,303 ± 0,006
ontdekkingsdatum	1951
parity	+

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

⁹²Kr

Massagetal	92
neutron number	56
Relative Atomic Mass	91,926173092 ± 0,0000029 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,84 ± 0,008 s
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1951
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.0332%

⁹³Kr

Massagetal	93
neutron number	57
Relative Atomic Mass	92,931147172 ± 0,0000027 Da
g-factor	-0,826 ± 0,004
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,287 ± 0,01 s
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	1951
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.95%

⁹⁴Kr

Massagetal	94
neutron number	58
Relative Atomic Mass	93,934140452 ± 0,000013 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	212 ± 4 ms
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1972
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.11%

⁹⁵Kr

Massagetal	95
neutron number	59
Relative Atomic Mass	94,939710922 ± 0,00002 Da
g-factor	-0,82 ± 0,006
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	114 ± 3 ms
spin	1/2
nuclear quadrupole moment	0
ontdekkingsdatum	1994
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.87%
2n (2-neutron emission)

⁹⁶Kr

Massagetal	96
neutron number	60
Relative Atomic Mass	95,943014473 ± 0,000020695 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	80 ± 8 ms
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1994
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	3.7%

⁹⁷Kr

Massagetal	97
neutron number	61
Relative Atomic Mass	96,949088782 ± 0,00014 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	62,2 ± 3,2 ms
spin	3/2
nuclear quadrupole moment
ontdekkingsdatum	1997
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	6.7%
2n (2-neutron emission)

⁹⁸Kr

Massagetal	98
neutron number	62
Relative Atomic Mass	97,952635 ± 0,000322 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	42,8 ± 3,6 ms
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1997
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	7%
2n (2-neutron emission)

⁹⁹Kr

Massagetal	99
neutron number	63
Relative Atomic Mass	98,958776 ± 0,000429 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	40 ± 11 ms
spin	5/2
nuclear quadrupole moment
ontdekkingsdatum	1997
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	11%
2n (2-neutron emission)

¹⁰⁰Kr

Massagetal	100
neutron number	64
Relative Atomic Mass	99,962995 ± 0,000429 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	12 ± 8 ms
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1997
parity	+

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

¹⁰¹Kr

Massagetal	101
neutron number	65
Relative Atomic Mass	100,969318 ± 0,000537 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	5/2
nuclear quadrupole moment
ontdekkingsdatum	2010
parity	+

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

geskiedenis

Ontdek deur	Sir William Ramsey, M.W. Travers
ligging van ontdekking	Great Britain
ontdekkingsdatum	1898
etimologie	Greek: kryptos (hidden).
uitspraak	KRIP-ton (Engels)

source

Abundance
Abundance in Earth's crust	0,0001 mg/kg
natural abundance (oseaan)	0,00021 mg/L
natural abundance (human body)
natural abundance (Meteoroïde)
natural abundance (Son)
Abundance in Universe	0,000004 %

Nuclear Screening Constants

1	s	0.7684
2	p	3.953
2	s	9.602
3	d	15.3741
3	p	15.5658
3	s	14.9673
4	p	26.2308
4	s	24.6844

Kripton on ChemicalAid

Australian Educational Vocabulary ID	scot/3534
BNCF	31853
BNF-kode	119666366
Biblioteca Nacional de España ID	XX534609
Brockhaus Enzyklopädie online ID	krypton-20
CAS Registry Number	7439-90-9
ChEBI ID	49696
ChEMBL ID	CHEMBL1233877
ChemSpider ID	5223
DSSTOX compound identifier	DTXCID3047637
DSSTox substance ID	DTXSID5064675
Den Store Danske ID	krypton
ECHA Substance Infocard ID	100.028.271
Encyclopædia Britannica Online ID	science/krypton-chemical-element
Encyclopædia Universalis ID	krypton
FAST ID	989199
Freebase-kode	/m/0286yf3
French Vikidia ID	Krypton
GND ID	4165832-2
Great Russian Encyclopedia Online ID	2112653
ICSC ID	0604
InChI	InChI=1S/Kr
InChIKey	DNNSSWSSYDEUBZ-UHFFFAOYSA-N
KBpedia ID	Krypton
LCCN	sh85073327
MeSH descriptor ID	D007726
NALT ID	48590
NDL-kode	00567028
NE.se ID	krypton
National Library of Israel J9U ID	987007548341105171
OmegaWiki Defined Meaning	159828
OpenAlex ID	C521692839
PDB ligand ID	KR
PDB structure ID	1C6Q
PDB structure ID	1C6G
PDB structure ID	1C6D
PDB structure ID	1C6J
PDB structure ID	1C61
PDB structure ID	1C67
PDB structure ID	1O1H
PDB structure ID	5D51
PDB structure ID	1C6A
PDB structure ID	1C6M
PDB structure ID	1C64
PDB structure ID	3GKT
PDB structure ID	1QTK
PSH ID	5820
Probes And Drugs ID	PD051789
PubChem CID	5416
Quora topic ID	Krypton-4
Römpp online ID	RD-11-02277
Semantic Scholar topic ID	56681
Store norske leksikon ID	krypton
Treccani ID	cripto
UK Archival Thesaurus ID	f2/mt225/4347/13304
UNII	5I8I620HVX
USGS Thesaurus ID	1487
WordNet 3.1 Synset ID	14667094-n
YSO ID	17370
ZVG number	7360

Kripton (Kr)

Physical Property

Chemical Property

other

Isotopes of Krypton

67Kr

68Kr

69Kr

70Kr

71Kr

72Kr

73Kr

74Kr

75Kr

76Kr

77Kr

78Kr

79Kr

80Kr

81Kr

82Kr

83Kr

84Kr

85Kr

86Kr

87Kr

88Kr

89Kr

90Kr

91Kr

92Kr

93Kr

94Kr

95Kr

96Kr

97Kr

98Kr

99Kr

100Kr

101Kr

geskiedenis

source

Nuclear Screening Constants

⁶⁷Kr

⁶⁸Kr

⁶⁹Kr

⁷⁰Kr

⁷¹Kr

⁷²Kr

⁷³Kr

⁷⁴Kr

⁷⁵Kr

⁷⁶Kr

⁷⁷Kr

⁷⁸Kr

⁷⁹Kr

⁸⁰Kr

⁸¹Kr

⁸²Kr

⁸³Kr

⁸⁴Kr

⁸⁵Kr

⁸⁶Kr

⁸⁷Kr

⁸⁸Kr

⁸⁹Kr

⁹⁰Kr

⁹¹Kr

⁹²Kr

⁹³Kr

⁹⁴Kr

⁹⁵Kr

⁹⁶Kr

⁹⁷Kr

⁹⁸Kr

⁹⁹Kr

¹⁰⁰Kr

¹⁰¹Kr