Cesium (Cs)

chemical element with symbol Cs and atomic number 55

Atomic Number	55
Atomic Weight	132.90545196
mass number	133

Group	1
Period	6
Block	s

proton	55 p⁺
neutron	78 n⁰
electron	55 e^-

Āhuatanga Ōkiko

Atomic Radius	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
density	1.873 g/cm³ 1,843 kg/m³

Chemical Property

{ERROR}

energy

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
standard enthalpy of formation	76.5 kJ/mol
electron

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

valence electron	1 ⓘ

electron configuration	[Xe] 6s¹ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹

oxidation number	-1, 1
electronegativity	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
color	Black #ff1493 #57178f #57178f
appearance	silvery gold
refractive index
thermodynamic material property
Thermal Conductivity	35.9 W/(m K)
thermal expansion
molar heat capacity	32.21 J/(mol K)
Specific Heat Capacity	0.242 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	5 MS/m
electrical resistivity	0.0000002 Ω*m
superconductivity
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000028 m³/Kg
magnetic susceptibility (Molar)	0.000000000372 m³/mol
magnetic susceptibility (Volume)	0.00000526
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	{ERROR}
lattice constant	6.05 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness	0.14 MPa 0.2 MPa
bulk modulus	1.6 GPa
shear modulus
Young's modulus	1.7 GPa
Poisson's ratio
speed of sound
classification
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

other

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

Isotopes of Cesium

Stable Isotopes	1
Unstable Isotopes	41
Natural Isotopes	1

¹¹¹Cs

mass number	111
neutron number	56
Relative Atomic Mass	110.953945 ± 0.000215 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	3/2
nuclear quadrupole moment
time of discovery or invention
parity	+

decay mode	intensity
p (proton emission)

¹¹²Cs

mass number	112
neutron number	57
Relative Atomic Mass	111.950172 ± 0.000124 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	490 ± 30 us
spin	1
nuclear quadrupole moment
time of discovery or invention	1994
parity	+

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

¹¹³Cs

mass number	113
neutron number	58
Relative Atomic Mass	112.944428484 ± 0.000009207 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	16.94 ± 0.09 us
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1984
parity	+

decay mode	intensity
p (proton emission)	100%

¹¹⁴Cs

mass number	114
neutron number	59
Relative Atomic Mass	113.941292244 ± 0.000091323 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	570 ± 20 ms
spin	1
nuclear quadrupole moment
time of discovery or invention	1978
parity	+

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

mass number	115
neutron number	60
Relative Atomic Mass	114.93591 ± 0.00011 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	1.4 ± 0.8 s
spin	9/2
nuclear quadrupole moment
time of discovery or invention	1978
parity	+

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

¹¹⁶Cs

mass number	116
neutron number	61
Relative Atomic Mass	115.933395 ± 0.000108 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	700 ± 40 ms
spin	1
nuclear quadrupole moment
time of discovery or invention	1975
parity	+

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

mass number	117
neutron number	62
Relative Atomic Mass	116.928616723 ± 0.000067 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	8.4 ± 0.6 s
spin	9/2
nuclear quadrupole moment
time of discovery or invention	1972
parity	+

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

¹¹⁸Cs

mass number	118
neutron number	63
Relative Atomic Mass	117.926559517 ± 0.00001369 Da
g-factor	1.935 ± 0.0025
natural abundance
radioactivity	☢️ radioactive element
half-life	14 ± 2 s
spin	2
nuclear quadrupole moment	1.31 ± 0.17
time of discovery or invention	1969
parity	+

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

mass number	119
neutron number	64
Relative Atomic Mass	118.922377327 ± 0.000014965 Da
g-factor	1.2111111111111 ± 0.0066666666666667
natural abundance
radioactivity	☢️ radioactive element
half-life	43 ± 0.2 s
spin	9/2
nuclear quadrupole moment	2.65 ± 0.17
time of discovery or invention	1969
parity	+

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

¹²⁰Cs

mass number	120
neutron number	65
Relative Atomic Mass	119.920677277 ± 0.000010702 Da
g-factor	1.93 ± 0.01
natural abundance
radioactivity	☢️ radioactive element
half-life	60.4 ± 0.6 s
spin	2
nuclear quadrupole moment	1.36 ± 0.07
time of discovery or invention	1969
parity	+

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

mass number	121
neutron number	66
Relative Atomic Mass	120.917227235 ± 0.00001534 Da
g-factor	0.51266666666667 ± 0.0026666666666667
natural abundance
radioactivity	☢️ radioactive element
half-life	155 ± 4 s
spin	3/2
nuclear quadrupole moment	0.79 ± 0.04
time of discovery or invention	1969
parity	+

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

¹²²Cs

mass number	122
neutron number	67
Relative Atomic Mass	121.916108144 ± 0.000036164 Da
g-factor	0.133 ± 0.002
natural abundance
radioactivity	☢️ radioactive element
half-life	21.18 ± 0.19 s
spin	1
nuclear quadrupole moment	-0.179 ± 0.01
time of discovery or invention	1969
parity	+

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

¹²³Cs

mass number	123
neutron number	68
Relative Atomic Mass	122.91299606 ± 0.000013 Da
g-factor	2.75 ± 0.014
natural abundance
radioactivity	☢️ radioactive element
half-life	5.88 ± 0.03 m
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1954
parity	+

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

¹²⁴Cs

mass number	124
neutron number	69
Relative Atomic Mass	123.912247366 ± 0.000009823 Da
g-factor	0.672 ± 0.003
natural abundance
radioactivity	☢️ radioactive element
half-life	30.9 ± 0.4 s
spin	1
nuclear quadrupole moment	-0.69 ± 0.04
time of discovery or invention	1969
parity	+

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

¹²⁵Cs

mass number	125
neutron number	70
Relative Atomic Mass	124.909725953 ± 0.000008304 Da
g-factor	2.814 ± 0.014
natural abundance
radioactivity	☢️ radioactive element
half-life	44.35 ± 0.29 m
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1954
parity	+

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

¹²⁶Cs

mass number	126
neutron number	71
Relative Atomic Mass	125.909445821 ± 0.00001112 Da
g-factor	0.776 ± 0.004
natural abundance
radioactivity	☢️ radioactive element
half-life	1.64 ± 0.02 m
spin	1
nuclear quadrupole moment	-0.64 ± 0.03
time of discovery or invention	1954
parity	+

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

¹²⁷Cs

mass number	127
neutron number	72
Relative Atomic Mass	126.907417527 ± 0.000005987 Da
g-factor	2.914 ± 0.014
natural abundance
radioactivity	☢️ radioactive element
half-life	6.25 ± 0.1 h
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1950
parity	+

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

¹²⁸Cs

mass number	128
neutron number	73
Relative Atomic Mass	127.907748452 ± 0.000005771 Da
g-factor	0.972 ± 0.005
natural abundance
radioactivity	☢️ radioactive element
half-life	3.64 ± 0.014 m
spin	1
nuclear quadrupole moment	-0.54 ± 0.03
time of discovery or invention	1951
parity	+

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

¹²⁹Cs

mass number	129
neutron number	74
Relative Atomic Mass	128.90606591 ± 0.000004888 Da
g-factor	2.978 ± 0.016
natural abundance
radioactivity	☢️ radioactive element
half-life	32.06 ± 0.06 h
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1950
parity	+

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

¹³⁰Cs

mass number	130
neutron number	75
Relative Atomic Mass	129.906709281 ± 0.000008971 Da
g-factor	1.458 ± 0.007
natural abundance
radioactivity	☢️ radioactive element
half-life	29.21 ± 0.04 m
spin	1
nuclear quadrupole moment	-0.056 ± 0.006
time of discovery or invention	1952
parity	+

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

¹³¹Cs

mass number	131
neutron number	76
Relative Atomic Mass	130.905468457 ± 0.00000019 Da
g-factor	1.4144 ± 0.0012
natural abundance
radioactivity	☢️ radioactive element
half-life	9.689 ± 0.016 d
spin	5/2
nuclear quadrupole moment	0.59 ± 0.02
time of discovery or invention	1947
parity	+

decay mode	intensity
ϵ (electron capture)	100%

¹³²Cs

mass number	132
neutron number	77
Relative Atomic Mass	131.90643774 ± 0.000001112 Da
g-factor	1.1095 ± 0.0035
natural abundance
radioactivity	☢️ radioactive element
half-life	6.48 ± 0.006 d
spin	2
nuclear quadrupole moment	0.48 ± 0.02
time of discovery or invention	1953
parity	+

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

¹³³Cs

mass number	133
neutron number	78
Relative Atomic Mass	132.905451958 ± 0.000000008 Da
g-factor	0.73651428571429 ± 0.0004
natural abundance	100
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	7/2
nuclear quadrupole moment	-0.00343 ± 0.0001
time of discovery or invention	1921
parity	+

¹³⁴Cs

mass number	134
neutron number	79
Relative Atomic Mass	133.906718501 ± 0.000000017 Da
g-factor	0.747325 ± 0.00035
natural abundance
radioactivity	☢️ radioactive element
half-life	2.065 ± 0.0004 y
spin	4
nuclear quadrupole moment	0.37 ± 0.02
time of discovery or invention	1940
parity	+

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

¹³⁵Cs

mass number	135
neutron number	80
Relative Atomic Mass	134.905976907 ± 0.00000039 Da
g-factor	0.77951428571429 ± 0.00037142857142857
natural abundance
radioactivity	☢️ radioactive element
half-life	1.33 ± 0.19 My
spin	7/2
nuclear quadrupole moment	0.048 ± 0.003
time of discovery or invention	1949
parity	+

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

¹³⁶Cs

mass number	136
neutron number	81
Relative Atomic Mass	135.907311431 ± 0.00000201 Da
g-factor	0.741 ± 0.003
natural abundance
radioactivity	☢️ radioactive element
half-life	13.01 ± 0.05 d
spin	5
nuclear quadrupole moment	0.213 ± 0.015
time of discovery or invention	1951
parity	+

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

¹³⁷Cs

mass number	137
neutron number	82
Relative Atomic Mass	136.907089296 ± 0.000000324 Da
g-factor	0.81068571428571 ± 0.0004
natural abundance
radioactivity	☢️ radioactive element
half-life	30.04 ± 0.04 y
spin	7/2
nuclear quadrupole moment	0.048 ± 0.002
time of discovery or invention	1951
parity	+

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

¹³⁸Cs

mass number	138
neutron number	83
Relative Atomic Mass	137.911017119 ± 0.000009831 Da
g-factor	0.233 ± 0.0013333333333333
natural abundance
radioactivity	☢️ radioactive element
half-life	33.5 ± 0.2 m
spin	3
nuclear quadrupole moment	0.112 ± 0.017
time of discovery or invention	1943
parity	-

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

¹³⁹Cs

mass number	139
neutron number	84
Relative Atomic Mass	138.913363822 ± 0.000003364 Da
g-factor	0.768 ± 0.0011428571428571
natural abundance
radioactivity	☢️ radioactive element
half-life	9.27 ± 0.05 m
spin	7/2
nuclear quadrupole moment	-0.063 ± 0.014
time of discovery or invention	1939
parity	+

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

¹⁴⁰Cs

mass number	140
neutron number	85
Relative Atomic Mass	139.917283707 ± 0.000008801 Da
g-factor	0.134 ± 0.001
natural abundance
radioactivity	☢️ radioactive element
half-life	63.7 ± 0.3 s
spin	1
nuclear quadrupole moment	-0.094 ± 0.015
time of discovery or invention	1950
parity	-

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

¹⁴¹Cs

mass number	141
neutron number	86
Relative Atomic Mass	140.920045279 ± 0.000009871 Da
g-factor	0.69457142857143 ± 0.0028571428571429
natural abundance
radioactivity	☢️ radioactive element
half-life	24.84 ± 0.16 s
spin	7/2
nuclear quadrupole moment	-0.42 ± 0.07
time of discovery or invention	1962
parity	+

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

¹⁴²Cs

mass number	142
neutron number	87
Relative Atomic Mass	141.924299514 ± 0.000007586 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	1.687 ± 0.01 s
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1962
parity	-

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

¹⁴³Cs

mass number	143
neutron number	88
Relative Atomic Mass	142.927347346 ± 0.00000813 Da
g-factor	0.57933333333333 ± 0.0026666666666667
natural abundance
radioactivity	☢️ radioactive element
half-life	1.802 ± 0.008 s
spin	3/2
nuclear quadrupole moment	0.44 ± 0.03
time of discovery or invention	1962
parity	+

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

¹⁴⁴Cs

mass number	144
neutron number	89
Relative Atomic Mass	143.932075402 ± 0.000021612 Da
g-factor	-0.545 ± 0.003
natural abundance
radioactivity	☢️ radioactive element
half-life	994 ± 6 ms
spin	1
nuclear quadrupole moment	0.29 ± 0.02
time of discovery or invention	1967
parity	-

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

¹⁴⁵Cs

mass number	145
neutron number	90
Relative Atomic Mass	144.935528927 ± 0.000009733 Da
g-factor	0.522 ± 0.0026666666666667
natural abundance
radioactivity	☢️ radioactive element
half-life	582 ± 4 ms
spin	3/2
nuclear quadrupole moment	0.58 ± 0.06
time of discovery or invention	1971
parity	+

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

¹⁴⁶Cs

mass number	146
neutron number	91
Relative Atomic Mass	145.940621867 ± 0.000003106 Da
g-factor	-0.514 ± 0.002
natural abundance
radioactivity	☢️ radioactive element
half-life	321.6 ± 0.9 ms
spin	1
nuclear quadrupole moment	0.21 ± 0.03
time of discovery or invention	1971
parity	-

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

¹⁴⁷Cs

mass number	147
neutron number	92
Relative Atomic Mass	146.944261512 ± 0.000009 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	230.5 ± 0.9 ms
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1978
parity	+

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

¹⁴⁸Cs

mass number	148
neutron number	93
Relative Atomic Mass	147.949639026 ± 0.000014 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	151.8 ± 1 ms
spin	2
nuclear quadrupole moment
time of discovery or invention	1978
parity	-

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

¹⁴⁹Cs

mass number	149
neutron number	94
Relative Atomic Mass	148.953516 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	112.3 ± 2.5 ms
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1979
parity	+

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

¹⁵⁰Cs

mass number	150
neutron number	95
Relative Atomic Mass	149.959023 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	81 ± 2.6 ms
spin	2
nuclear quadrupole moment
time of discovery or invention	1979
parity	-

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

¹⁵¹Cs

mass number	151
neutron number	96
Relative Atomic Mass	150.963199 ± 0.000537 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	59 ± 19 ms
spin	3/2
nuclear quadrupole moment
time of discovery or invention	1979
parity	+

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

¹⁵²Cs

mass number	152
neutron number	97
Relative Atomic Mass	151.968728 ± 0.000537 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin
nuclear quadrupole moment
time of discovery or invention	1987
parity

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

kōrero nehe

discoverer or inventor	Gustov Kirchoff, Robert Bunsen
location of discovery	Germany
time of discovery or invention	1860
etymology	Latin: coesius (sky blue); for the blue lines of its spectrum.
pronunciation	SEE-zi-em (Ingarihi)

source

Abundance
Abundance in Earth's crust	3 mg/kg
natural abundance (Moana nui)	0.0003 mg/L
natural abundance (human body)	0.000002 %
natural abundance (meteoroid)	0.000014 %
natural abundance (Te Rā)	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

Cesium on ChemicalAid

caesium

Cesium (Cs)

Āhuatanga Ōkiko

Chemical Property

other

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

kōrero nehe

source

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