Caeisiam (Cs)

chemical element with symbol Cs and atomic number 55

Atomic Number	55
Atomic Weight	132.90545196
Núicléónuimhir	133

Group	1
Period	6
Block	s

prótón	55 p⁺
neodrón	78 n⁰
leictreon	55 e^-

Physical Property

Ga Adamhach	260 pm 249 pm
molar volume	70 cm³/mol
covalent radius	232 pm 209 pm 237 pm 244 pm
Metallic Radius	235 pm 267 pm
ionic radius	167 pm 174 pm 178 pm 181 pm 185 pm 188 pm
Crystal Radius	181 pm 188 pm 192 pm 195 pm 199 pm 202 pm
Van der Waals radius	300 pm 343 pm 344 pm 343 pm 451.7 pm
dlús	1.873 g/cm³ 1,843 kg/m³

Chemical Property

{ERROR}

fuinneamh

proton affinity
electron affinity	0.471626 eV/particle
ionization energy	3.893905548 eV/particle 23.15745 eV/particle 33.195 eV/particle 43 eV/particle 56 eV/particle 69.1 eV/particle 82.9 eV/particle 110.09 eV/particle 125.61 eV/particle 213.3 eV/particle 233 eV/particle 261 eV/particle 289 eV/particle 316 eV/particle 352 eV/particle 382 eV/particle 413 eV/particle 445 eV/particle 476 eV/particle 597 eV/particle 629 eV/particle 666 eV/particle 700 eV/particle 753 eV/particle 791 eV/particle 875 eV/particle 916.07 eV/particle 1,592 eV/particle 1,672 eV/particle 1,757 eV/particle 1,848 eV/particle 1,936 eV/particle 2,029 eV/particle 2,137 eV/particle 2,230 eV/particle 2,329 eV/particle 2,422 eV/particle 2,683 eV/particle 2,767 eV/particle 2,859 eV/particle 2,945 eV/particle 3,118 eV/particle 3,214 eV/particle 3,392 eV/particle 3,485 eV/particle 7,989 eV/particle 8,224 eV/particle 8,484 eV/particle 8,726 eV/particle 9,350 eV/particle 9,629 eV/particle 9,974 eV/particle 10,208.78 eV/particle 41,861.073 eV/particle 42,912.99 eV/particle

enthalpy of vaporization	68.3 kJ/mol
enthalpy of fusion	2.09 kJ/mol
eantalpacht chaighdeánach an fhoirmithe	76.5 kJ/mol
leictreon

electron shell	2, 8, 18, 18, 8, 1

Fiúsleictreon	1 ⓘ

cumraíocht leictreon	[Xe] 6s¹ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹

Staid ocsaídiúcháine	-1, 1
Leictridhiúltacht	3.898 eV/particle 0.1542125 0.79
Electrophilicity Index	0.696095447101947 eV/particle
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point	944.15 K
Melting Point	301.65 K
critical pressure	9.4 MPa
critical temperature	1,938.15 K
triple point
appearance
dath	Black #ff1493 #57178f #57178f
appearance	silvery gold
Comhéifeacht athraonta
thermodynamic material property
Thermal Conductivity	35.9 W/(m K)
Forbairt theirmeach
molar heat capacity	32.21 J/(mol K)
Specific Heat Capacity	0.242 J/(g⋅K)
Cóimheas saintoilleadh teasa
electrical properties
type	Conductor
electrical conductivity	5 MS/m
Friotachas	0.0000002 Ω*m
Forsheoltacht
Maighnéadas
type	paramagnetic
So-ghabhálacht mhaighnéadach (Mass)	0.0000000028 m³/Kg
So-ghabhálacht mhaighnéadach (Molar)	0.000000000372 m³/mol
So-ghabhálacht mhaighnéadach (Volume)	0.00000526
magnetic ordering
Teocht Curie
Néel temperature
struchtúr
Crystal Structure	{ERROR}
lattice constant	6.05 Å
Lattice Angles	π/2, π/2, π/2
airíonna meicniúla
Cruas	0.14 MPa 0.2 MPa
Modal toirte	1.6 GPa
modal fiartha
modal Young	1.7 GPa
Cóimheas Poisson
luas forleata fuaime
aicmiúchán
Category	Actinides, Alkali metals
CAS Group	IA
IUPAC Group	IA
Glawe Number	8
Mendeleev Number	5
Pettifor Number	8
Geochemical Class	alkali metal
Goldschmidt classification	litophile

eile

Gas Basicity
polarizability	400.9 ± 0.7 a₀
C6 Dispersion Coefficient	6,660 a₀
allotrope
Crosghearradh	29
Neutron Mass Absorption	0.0077
Uimhir chandamach	2S1/2
space group	229 (Im_3m)

Isotopes of Cesium

Stable Isotopes	1
Unstable Isotopes	41
Natural Isotopes	1

¹¹¹Cs

Núicléónuimhir	111
neutron number	56
Mais Adamhach Choibhneasta	110.953945 ± 0.000215 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)

¹¹²Cs

Núicléónuimhir	112
neutron number	57
Mais Adamhach Choibhneasta	111.950172 ± 0.000124 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	490 ± 30 us
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1994
Paireacht	+

decay mode	intensity
p (proton emission)	100%
α (α emission)	0.26%

¹¹³Cs

Núicléónuimhir	113
neutron number	58
Mais Adamhach Choibhneasta	112.944428484 ± 0.000009207 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	16.94 ± 0.09 us
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1984
Paireacht	+

decay mode	intensity
p (proton emission)	100%

¹¹⁴Cs

Núicléónuimhir	114
neutron number	59
Mais Adamhach Choibhneasta	113.941292244 ± 0.000091323 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	570 ± 20 ms
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1978
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.018%
β⁺ p (β⁺-delayed proton emission)	8.7%
β⁺α (β⁺-delayed α emission)	0.19%

¹¹⁵Cs

Núicléónuimhir	115
neutron number	60
Mais Adamhach Choibhneasta	114.93591 ± 0.00011 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.4 ± 0.8 s
Guairne	9/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1978
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.07%

¹¹⁶Cs

Núicléónuimhir	116
neutron number	61
Mais Adamhach Choibhneasta	115.933395 ± 0.000108 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	700 ± 40 ms
Guairne	1
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1975
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.28%
β⁺α (β⁺-delayed α emission)	0.049%

¹¹⁷Cs

Núicléónuimhir	117
neutron number	62
Mais Adamhach Choibhneasta	116.928616723 ± 0.000067 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	8.4 ± 0.6 s
Guairne	9/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1972
Paireacht	+

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

¹¹⁸Cs

Núicléónuimhir	118
neutron number	63
Mais Adamhach Choibhneasta	117.926559517 ± 0.00001369 Da
G-fhachtóir	1.935 ± 0.0025
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	14 ± 2 s
Guairne	2
nuclear quadrupole moment	1.31 ± 0.17
dáta fionnachtana nó tionscnaimh	1969
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.021%
β⁺α (β⁺-delayed α emission)	0.0012%

¹¹⁹Cs

Núicléónuimhir	119
neutron number	64
Mais Adamhach Choibhneasta	118.922377327 ± 0.000014965 Da
G-fhachtóir	1.2111111111111 ± 0.0066666666666667
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	43 ± 0.2 s
Guairne	9/2
nuclear quadrupole moment	2.65 ± 0.17
dáta fionnachtana nó tionscnaimh	1969
Paireacht	+

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

¹²⁰Cs

Núicléónuimhir	120
neutron number	65
Mais Adamhach Choibhneasta	119.920677277 ± 0.000010702 Da
G-fhachtóir	1.93 ± 0.01
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	60.4 ± 0.6 s
Guairne	2
nuclear quadrupole moment	1.36 ± 0.07
dáta fionnachtana nó tionscnaimh	1969
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺α (β⁺-delayed α emission)	2%
β⁺ p (β⁺-delayed proton emission)	7%

¹²¹Cs

Núicléónuimhir	121
neutron number	66
Mais Adamhach Choibhneasta	120.917227235 ± 0.00001534 Da
G-fhachtóir	0.51266666666667 ± 0.0026666666666667
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	155 ± 4 s
Guairne	3/2
nuclear quadrupole moment	0.79 ± 0.04
dáta fionnachtana nó tionscnaimh	1969
Paireacht	+

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

¹²²Cs

Núicléónuimhir	122
neutron number	67
Mais Adamhach Choibhneasta	121.916108144 ± 0.000036164 Da
G-fhachtóir	0.133 ± 0.002
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	21.18 ± 0.19 s
Guairne	1
nuclear quadrupole moment	-0.179 ± 0.01
dáta fionnachtana nó tionscnaimh	1969
Paireacht	+

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

¹²³Cs

Núicléónuimhir	123
neutron number	68
Mais Adamhach Choibhneasta	122.91299606 ± 0.000013 Da
G-fhachtóir	2.75 ± 0.014
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	5.88 ± 0.03 m
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1954
Paireacht	+

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

¹²⁴Cs

Núicléónuimhir	124
neutron number	69
Mais Adamhach Choibhneasta	123.912247366 ± 0.000009823 Da
G-fhachtóir	0.672 ± 0.003
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	30.9 ± 0.4 s
Guairne	1
nuclear quadrupole moment	-0.69 ± 0.04
dáta fionnachtana nó tionscnaimh	1969
Paireacht	+

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

¹²⁵Cs

Núicléónuimhir	125
neutron number	70
Mais Adamhach Choibhneasta	124.909725953 ± 0.000008304 Da
G-fhachtóir	2.814 ± 0.014
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	44.35 ± 0.29 m
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1954
Paireacht	+

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

¹²⁶Cs

Núicléónuimhir	126
neutron number	71
Mais Adamhach Choibhneasta	125.909445821 ± 0.00001112 Da
G-fhachtóir	0.776 ± 0.004
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.64 ± 0.02 m
Guairne	1
nuclear quadrupole moment	-0.64 ± 0.03
dáta fionnachtana nó tionscnaimh	1954
Paireacht	+

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

¹²⁷Cs

Núicléónuimhir	127
neutron number	72
Mais Adamhach Choibhneasta	126.907417527 ± 0.000005987 Da
G-fhachtóir	2.914 ± 0.014
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	6.25 ± 0.1 h
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1950
Paireacht	+

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

¹²⁸Cs

Núicléónuimhir	128
neutron number	73
Mais Adamhach Choibhneasta	127.907748452 ± 0.000005771 Da
G-fhachtóir	0.972 ± 0.005
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	3.64 ± 0.014 m
Guairne	1
nuclear quadrupole moment	-0.54 ± 0.03
dáta fionnachtana nó tionscnaimh	1951
Paireacht	+

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

¹²⁹Cs

Núicléónuimhir	129
neutron number	74
Mais Adamhach Choibhneasta	128.90606591 ± 0.000004888 Da
G-fhachtóir	2.978 ± 0.016
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	32.06 ± 0.06 h
Guairne	1/2
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1950
Paireacht	+

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

¹³⁰Cs

Núicléónuimhir	130
neutron number	75
Mais Adamhach Choibhneasta	129.906709281 ± 0.000008971 Da
G-fhachtóir	1.458 ± 0.007
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	29.21 ± 0.04 m
Guairne	1
nuclear quadrupole moment	-0.056 ± 0.006
dáta fionnachtana nó tionscnaimh	1952
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	98.4%
β⁻ (β⁻ decay)	1.6%

¹³¹Cs

Núicléónuimhir	131
neutron number	76
Mais Adamhach Choibhneasta	130.905468457 ± 0.00000019 Da
G-fhachtóir	1.4144 ± 0.0012
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	9.689 ± 0.016 d
Guairne	5/2
nuclear quadrupole moment	0.59 ± 0.02
dáta fionnachtana nó tionscnaimh	1947
Paireacht	+

decay mode	intensity
ϵ (electron capture)	100%

¹³²Cs

Núicléónuimhir	132
neutron number	77
Mais Adamhach Choibhneasta	131.90643774 ± 0.000001112 Da
G-fhachtóir	1.1095 ± 0.0035
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	6.48 ± 0.006 d
Guairne	2
nuclear quadrupole moment	0.48 ± 0.02
dáta fionnachtana nó tionscnaimh	1953
Paireacht	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	98.13%
β⁻ (β⁻ decay)	1.87%

¹³³Cs

Núicléónuimhir	133
neutron number	78
Mais Adamhach Choibhneasta	132.905451958 ± 0.000000008 Da
G-fhachtóir	0.73651428571429 ± 0.0004
natural abundance	100
Meath radaighníomhach	stable isotope
leathré	Not Radioactive ☢️
Guairne	7/2
nuclear quadrupole moment	-0.00343 ± 0.0001
dáta fionnachtana nó tionscnaimh	1921
Paireacht	+

¹³⁴Cs

Núicléónuimhir	134
neutron number	79
Mais Adamhach Choibhneasta	133.906718501 ± 0.000000017 Da
G-fhachtóir	0.747325 ± 0.00035
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	2.065 ± 0.0004 y
Guairne	4
nuclear quadrupole moment	0.37 ± 0.02
dáta fionnachtana nó tionscnaimh	1940
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
ϵ (electron capture)	0.0003%

¹³⁵Cs

Núicléónuimhir	135
neutron number	80
Mais Adamhach Choibhneasta	134.905976907 ± 0.00000039 Da
G-fhachtóir	0.77951428571429 ± 0.00037142857142857
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.33 ± 0.19 My
Guairne	7/2
nuclear quadrupole moment	0.048 ± 0.003
dáta fionnachtana nó tionscnaimh	1949
Paireacht	+

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

¹³⁶Cs

Núicléónuimhir	136
neutron number	81
Mais Adamhach Choibhneasta	135.907311431 ± 0.00000201 Da
G-fhachtóir	0.741 ± 0.003
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	13.01 ± 0.05 d
Guairne	5
nuclear quadrupole moment	0.213 ± 0.015
dáta fionnachtana nó tionscnaimh	1951
Paireacht	+

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

¹³⁷Cs

Núicléónuimhir	137
neutron number	82
Mais Adamhach Choibhneasta	136.907089296 ± 0.000000324 Da
G-fhachtóir	0.81068571428571 ± 0.0004
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	30.04 ± 0.04 y
Guairne	7/2
nuclear quadrupole moment	0.048 ± 0.002
dáta fionnachtana nó tionscnaimh	1951
Paireacht	+

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

¹³⁸Cs

Núicléónuimhir	138
neutron number	83
Mais Adamhach Choibhneasta	137.911017119 ± 0.000009831 Da
G-fhachtóir	0.233 ± 0.0013333333333333
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	33.5 ± 0.2 m
Guairne	3
nuclear quadrupole moment	0.112 ± 0.017
dáta fionnachtana nó tionscnaimh	1943
Paireacht	-

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

¹³⁹Cs

Núicléónuimhir	139
neutron number	84
Mais Adamhach Choibhneasta	138.913363822 ± 0.000003364 Da
G-fhachtóir	0.768 ± 0.0011428571428571
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	9.27 ± 0.05 m
Guairne	7/2
nuclear quadrupole moment	-0.063 ± 0.014
dáta fionnachtana nó tionscnaimh	1939
Paireacht	+

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

¹⁴⁰Cs

Núicléónuimhir	140
neutron number	85
Mais Adamhach Choibhneasta	139.917283707 ± 0.000008801 Da
G-fhachtóir	0.134 ± 0.001
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	63.7 ± 0.3 s
Guairne	1
nuclear quadrupole moment	-0.094 ± 0.015
dáta fionnachtana nó tionscnaimh	1950
Paireacht	-

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

¹⁴¹Cs

Núicléónuimhir	141
neutron number	86
Mais Adamhach Choibhneasta	140.920045279 ± 0.000009871 Da
G-fhachtóir	0.69457142857143 ± 0.0028571428571429
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	24.84 ± 0.16 s
Guairne	7/2
nuclear quadrupole moment	-0.42 ± 0.07
dáta fionnachtana nó tionscnaimh	1962
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.0342%

¹⁴²Cs

Núicléónuimhir	142
neutron number	87
Mais Adamhach Choibhneasta	141.924299514 ± 0.000007586 Da
G-fhachtóir	0
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.687 ± 0.01 s
Guairne	0
nuclear quadrupole moment	0
dáta fionnachtana nó tionscnaimh	1962
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.089%

¹⁴³Cs

Núicléónuimhir	143
neutron number	88
Mais Adamhach Choibhneasta	142.927347346 ± 0.00000813 Da
G-fhachtóir	0.57933333333333 ± 0.0026666666666667
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	1.802 ± 0.008 s
Guairne	3/2
nuclear quadrupole moment	0.44 ± 0.03
dáta fionnachtana nó tionscnaimh	1962
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.62%

¹⁴⁴Cs

Núicléónuimhir	144
neutron number	89
Mais Adamhach Choibhneasta	143.932075402 ± 0.000021612 Da
G-fhachtóir	-0.545 ± 0.003
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	994 ± 6 ms
Guairne	1
nuclear quadrupole moment	0.29 ± 0.02
dáta fionnachtana nó tionscnaimh	1967
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.98%

¹⁴⁵Cs

Núicléónuimhir	145
neutron number	90
Mais Adamhach Choibhneasta	144.935528927 ± 0.000009733 Da
G-fhachtóir	0.522 ± 0.0026666666666667
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	582 ± 4 ms
Guairne	3/2
nuclear quadrupole moment	0.58 ± 0.06
dáta fionnachtana nó tionscnaimh	1971
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	12.8%

¹⁴⁶Cs

Núicléónuimhir	146
neutron number	91
Mais Adamhach Choibhneasta	145.940621867 ± 0.000003106 Da
G-fhachtóir	-0.514 ± 0.002
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	321.6 ± 0.9 ms
Guairne	1
nuclear quadrupole moment	0.21 ± 0.03
dáta fionnachtana nó tionscnaimh	1971
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	14.2%
2n (2-neutron emission)

¹⁴⁷Cs

Núicléónuimhir	147
neutron number	92
Mais Adamhach Choibhneasta	146.944261512 ± 0.000009 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	230.5 ± 0.9 ms
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1978
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	28.5%

¹⁴⁸Cs

Núicléónuimhir	148
neutron number	93
Mais Adamhach Choibhneasta	147.949639026 ± 0.000014 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	151.8 ± 1 ms
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1978
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	28.7%
2n (2-neutron emission)

¹⁴⁹Cs

Núicléónuimhir	149
neutron number	94
Mais Adamhach Choibhneasta	148.953516 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	112.3 ± 2.5 ms
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1979
Paireacht	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	25%
2n (2-neutron emission)

¹⁵⁰Cs

Núicléónuimhir	150
neutron number	95
Mais Adamhach Choibhneasta	149.959023 ± 0.000429 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	81 ± 2.6 ms
Guairne	2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1979
Paireacht	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	44%
2n (2-neutron emission)

¹⁵¹Cs

Núicléónuimhir	151
neutron number	96
Mais Adamhach Choibhneasta	150.963199 ± 0.000537 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré	59 ± 19 ms
Guairne	3/2
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1979
Paireacht	+

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

¹⁵²Cs

Núicléónuimhir	152
neutron number	97
Mais Adamhach Choibhneasta	151.968728 ± 0.000537 Da
G-fhachtóir
natural abundance
Meath radaighníomhach	☢️ radioactive element
leathré
Guairne
nuclear quadrupole moment
dáta fionnachtana nó tionscnaimh	1987
Paireacht

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

stair

fionnachtaí nó aireagóir	Gustov Kirchoff, Robert Bunsen
áit ar tháinig air/uirthi	Germany
dáta fionnachtana nó tionscnaimh	1860
Sanasaíocht	Latin: coesius (sky blue); for the blue lines of its spectrum.
pronunciation	SEE-zi-em (Béarla)

foinse

Abundance
Abundance in Earth's crust	3 mg/kg
natural abundance (aigéan)	0.0003 mg/L
natural abundance (corp an duine)	0.000002 %
natural abundance (dreigeoideach)	0.000014 %
natural abundance (An Ghrian)	0.0000008 %
Abundance in Universe	0.00000008 %

Nuclear Screening Constants

1	s	1.0957
2	p	4.1804
2	s	14.4884
3	d	14.0194
3	p	18.4222
3	s	18.6226
4	d	32.1616
4	p	29.1424
4	s	27.9576
5	p	41.349
5	s	39.5555
6	s	48.637

Caeisiam on ChemicalAid

Caeisiam (Cs)

Physical Property

Chemical Property

eile

Isotopes of Cesium

111Cs

112Cs

113Cs

114Cs

115Cs

116Cs

117Cs

118Cs

119Cs

120Cs

121Cs

122Cs

123Cs

124Cs

125Cs

126Cs

127Cs

128Cs

129Cs

130Cs

131Cs

132Cs

133Cs

134Cs

135Cs

136Cs

137Cs

138Cs

139Cs

140Cs

141Cs

142Cs

143Cs

144Cs

145Cs

146Cs

147Cs

148Cs

149Cs

150Cs

151Cs

152Cs

stair

foinse

Nuclear Screening Constants

¹¹¹Cs

¹¹²Cs

¹¹³Cs

¹¹⁴Cs

¹¹⁵Cs

¹¹⁶Cs

¹¹⁷Cs

¹¹⁸Cs

¹¹⁹Cs

¹²⁰Cs

¹²¹Cs

¹²²Cs

¹²³Cs

¹²⁴Cs

¹²⁵Cs

¹²⁶Cs

¹²⁷Cs

¹²⁸Cs

¹²⁹Cs

¹³⁰Cs

¹³¹Cs

¹³²Cs

¹³³Cs

¹³⁴Cs

¹³⁵Cs

¹³⁶Cs

¹³⁷Cs

¹³⁸Cs

¹³⁹Cs

¹⁴⁰Cs

¹⁴¹Cs

¹⁴²Cs

¹⁴³Cs

¹⁴⁴Cs

¹⁴⁵Cs

¹⁴⁶Cs

¹⁴⁷Cs

¹⁴⁸Cs

¹⁴⁹Cs

¹⁵⁰Cs

¹⁵¹Cs

¹⁵²Cs