Cesi

Cesi (Cs)

chemical element with symbol Cs and atomic number 55
Atomic Number55
Atomic Weight132.90545196
mass number133
Group1
Period6
Blocks
proton55 p+
neutron78 n0
electron55 e-
Animated Bohr model of Cs (Cesi)

Proprietat Fisica

Rai Atomic
molar volume
covalent radius
Metallic Radius
ionic radius
Crystal Radius
Rai de van der Waals
densitat
Atomic Radii Of The Elements: Cesi0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350pmRai AtomicCovalent RadiusMetallic RadiusRai de van der Waals

Chemical Property

energia
proton affinity
electron affinity
ionization energy
ionization energy of Cs (Cesi)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
electron
electron shell2, 8, 18, 18, 8, 1
Bohr model: Cs (Cesi)
valence electron1
Lewis structure: Cs (Cesi)
electron configuration[Xe] 6s1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1
Enhanced Bohr model of Cs (Cesi)
Orbital Diagram of Cs (Cesi)
oxidation number-1, 1
Electronegativitat
0.79
Electrophilicity Index
fundamental state of matter
estat de la matèriaSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
Ponch triple
appearance
Color
Silver
appearancesilvery gold
Indici de refraccion
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
electrical resistivity
superconductivity
magnetism
typeparamagnetic
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
estructura
Crystal StructureBody Centered Cubic (BCC)
lattice constant
Lattice Anglesπ/2, π/2, π/2
mechanical property
Duretat
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryAlkali metals, Alkali metals
CAS GroupIA
IUPAC GroupIA
Glawe Number8
Mendeleev Number5
Pettifor Number8
Geochemical Classalkali metal
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
C6 Dispersion Coefficient
allotrope
Neutron cross section
29
Neutron Mass Absorption
0.0077
quantum number2S1/2
space group229 (Im_3m)

Isotopes of Cesium

Stable Isotopes1
Unstable Isotopes41
Natural Isotopes1

111Cs

mass number111
neutron number56
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin3/2
nuclear quadrupole moment
data de descobèrta
parity+

decay modeintensity
p (proton emission)

112Cs

mass number112
neutron number57
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
490 ± 30 us
Espin1
nuclear quadrupole moment
data de descobèrta1994
parity+

decay modeintensity
p (proton emission)100%
α (α emission)0.26%

113Cs

mass number113
neutron number58
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
16.94 ± 0.09 us
Espin3/2
nuclear quadrupole moment
data de descobèrta1984
parity+

decay modeintensity
p (proton emission)100%

114Cs

mass number114
neutron number59
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
570 ± 20 ms
Espin1
nuclear quadrupole moment
data de descobèrta1978
parity+

decay modeintensity
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 number115
neutron number60
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.4 ± 0.8 s
Espin9/2
nuclear quadrupole moment
data de descobèrta1978
parity+

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

116Cs

mass number116
neutron number61
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
700 ± 40 ms
Espin1
nuclear quadrupole moment
data de descobèrta1975
parity+

decay modeintensity
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 number117
neutron number62
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
8.4 ± 0.6 s
Espin9/2
nuclear quadrupole moment
data de descobèrta1972
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

118Cs

mass number118
neutron number63
Relative Atomic Mass
g-factor
1.935 ± 0.0025
natural abundance
Radioactivitat☢️ radioactive element
Semivida
14 ± 2 s
Espin2
nuclear quadrupole moment
1.31 ± 0.17
data de descobèrta1969
parity+

decay modeintensity
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 number119
neutron number64
Relative Atomic Mass
g-factor
1.2111111111111 ± 0.0066666666666667
natural abundance
Radioactivitat☢️ radioactive element
Semivida
43 ± 0.2 s
Espin9/2
nuclear quadrupole moment
2.65 ± 0.17
data de descobèrta1969
parity+

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

120Cs

mass number120
neutron number65
Relative Atomic Mass
g-factor
1.93 ± 0.01
natural abundance
Radioactivitat☢️ radioactive element
Semivida
60.4 ± 0.6 s
Espin2
nuclear quadrupole moment
1.36 ± 0.07
data de descobèrta1969
parity+

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

121Cs

mass number121
neutron number66
Relative Atomic Mass
g-factor
0.51266666666667 ± 0.0026666666666667
natural abundance
Radioactivitat☢️ radioactive element
Semivida
155 ± 4 s
Espin3/2
nuclear quadrupole moment
0.79 ± 0.04
data de descobèrta1969
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

122Cs

mass number122
neutron number67
Relative Atomic Mass
g-factor
0.133 ± 0.002
natural abundance
Radioactivitat☢️ radioactive element
Semivida
21.18 ± 0.19 s
Espin1
nuclear quadrupole moment
-0.179 ± 0.01
data de descobèrta1969
parity+

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

123Cs

mass number123
neutron number68
Relative Atomic Mass
g-factor
2.75 ± 0.014
natural abundance
Radioactivitat☢️ radioactive element
Semivida
5.88 ± 0.03 m
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1954
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

124Cs

mass number124
neutron number69
Relative Atomic Mass
g-factor
0.672 ± 0.003
natural abundance
Radioactivitat☢️ radioactive element
Semivida
30.9 ± 0.4 s
Espin1
nuclear quadrupole moment
-0.69 ± 0.04
data de descobèrta1969
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

125Cs

mass number125
neutron number70
Relative Atomic Mass
g-factor
2.814 ± 0.014
natural abundance
Radioactivitat☢️ radioactive element
Semivida
44.35 ± 0.29 m
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1954
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

126Cs

mass number126
neutron number71
Relative Atomic Mass
g-factor
0.776 ± 0.004
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.64 ± 0.02 m
Espin1
nuclear quadrupole moment
-0.64 ± 0.03
data de descobèrta1954
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

127Cs

mass number127
neutron number72
Relative Atomic Mass
g-factor
2.914 ± 0.014
natural abundance
Radioactivitat☢️ radioactive element
Semivida
6.25 ± 0.1 h
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

128Cs

mass number128
neutron number73
Relative Atomic Mass
g-factor
0.972 ± 0.005
natural abundance
Radioactivitat☢️ radioactive element
Semivida
3.64 ± 0.014 m
Espin1
nuclear quadrupole moment
-0.54 ± 0.03
data de descobèrta1951
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

129Cs

mass number129
neutron number74
Relative Atomic Mass
g-factor
2.978 ± 0.016
natural abundance
Radioactivitat☢️ radioactive element
Semivida
32.06 ± 0.06 h
Espin1/2
nuclear quadrupole moment
0
data de descobèrta1950
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

130Cs

mass number130
neutron number75
Relative Atomic Mass
g-factor
1.458 ± 0.007
natural abundance
Radioactivitat☢️ radioactive element
Semivida
29.21 ± 0.04 m
Espin1
nuclear quadrupole moment
-0.056 ± 0.006
data de descobèrta1952
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)98.4%
β (β decay)1.6%

131Cs

mass number131
neutron number76
Relative Atomic Mass
g-factor
1.4144 ± 0.0012
natural abundance
Radioactivitat☢️ radioactive element
Semivida
9.689 ± 0.016 d
Espin5/2
nuclear quadrupole moment
0.59 ± 0.02
data de descobèrta1947
parity+

decay modeintensity
ϵ (electron capture)100%

132Cs

mass number132
neutron number77
Relative Atomic Mass
g-factor
1.1095 ± 0.0035
natural abundance
Radioactivitat☢️ radioactive element
Semivida
6.48 ± 0.006 d
Espin2
nuclear quadrupole moment
0.48 ± 0.02
data de descobèrta1953
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)98.13%
β (β decay)1.87%

133Cs

mass number133
neutron number78
Relative Atomic Mass
g-factor
0.73651428571429 ± 0.0004
natural abundance
100
Radioactivitatstable isotope
SemividaNot Radioactive ☢️
Espin7/2
nuclear quadrupole moment
-0.00343 ± 0.0001
data de descobèrta1921
parity+

134Cs

mass number134
neutron number79
Relative Atomic Mass
g-factor
0.747325 ± 0.00035
natural abundance
Radioactivitat☢️ radioactive element
Semivida
2.065 ± 0.0004 y
Espin4
nuclear quadrupole moment
0.37 ± 0.02
data de descobèrta1940
parity+

decay modeintensity
β (β decay)100%
ϵ (electron capture)0.0003%

135Cs

mass number135
neutron number80
Relative Atomic Mass
g-factor
0.77951428571429 ± 0.00037142857142857
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.33 ± 0.19 My
Espin7/2
nuclear quadrupole moment
0.048 ± 0.003
data de descobèrta1949
parity+

decay modeintensity
β (β decay)100%

136Cs

mass number136
neutron number81
Relative Atomic Mass
g-factor
0.741 ± 0.003
natural abundance
Radioactivitat☢️ radioactive element
Semivida
13.01 ± 0.05 d
Espin5
nuclear quadrupole moment
0.213 ± 0.015
data de descobèrta1951
parity+

decay modeintensity
β (β decay)100%

137Cs

mass number137
neutron number82
Relative Atomic Mass
g-factor
0.81068571428571 ± 0.0004
natural abundance
Radioactivitat☢️ radioactive element
Semivida
30.04 ± 0.04 y
Espin7/2
nuclear quadrupole moment
0.048 ± 0.002
data de descobèrta1951
parity+

decay modeintensity
β (β decay)100%

138Cs

mass number138
neutron number83
Relative Atomic Mass
g-factor
0.233 ± 0.0013333333333333
natural abundance
Radioactivitat☢️ radioactive element
Semivida
33.5 ± 0.2 m
Espin3
nuclear quadrupole moment
0.112 ± 0.017
data de descobèrta1943
parity-

decay modeintensity
β (β decay)100%

139Cs

mass number139
neutron number84
Relative Atomic Mass
g-factor
0.768 ± 0.0011428571428571
natural abundance
Radioactivitat☢️ radioactive element
Semivida
9.27 ± 0.05 m
Espin7/2
nuclear quadrupole moment
-0.063 ± 0.014
data de descobèrta1939
parity+

decay modeintensity
β (β decay)100%

140Cs

mass number140
neutron number85
Relative Atomic Mass
g-factor
0.134 ± 0.001
natural abundance
Radioactivitat☢️ radioactive element
Semivida
63.7 ± 0.3 s
Espin1
nuclear quadrupole moment
-0.094 ± 0.015
data de descobèrta1950
parity-

decay modeintensity
β (β decay)100%

141Cs

mass number141
neutron number86
Relative Atomic Mass
g-factor
0.69457142857143 ± 0.0028571428571429
natural abundance
Radioactivitat☢️ radioactive element
Semivida
24.84 ± 0.16 s
Espin7/2
nuclear quadrupole moment
-0.42 ± 0.07
data de descobèrta1962
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.0342%

142Cs

mass number142
neutron number87
Relative Atomic Mass
g-factor
0
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.687 ± 0.01 s
Espin0
nuclear quadrupole moment
0
data de descobèrta1962
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.089%

143Cs

mass number143
neutron number88
Relative Atomic Mass
g-factor
0.57933333333333 ± 0.0026666666666667
natural abundance
Radioactivitat☢️ radioactive element
Semivida
1.802 ± 0.008 s
Espin3/2
nuclear quadrupole moment
0.44 ± 0.03
data de descobèrta1962
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)1.62%

144Cs

mass number144
neutron number89
Relative Atomic Mass
g-factor
-0.545 ± 0.003
natural abundance
Radioactivitat☢️ radioactive element
Semivida
994 ± 6 ms
Espin1
nuclear quadrupole moment
0.29 ± 0.02
data de descobèrta1967
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)2.98%

145Cs

mass number145
neutron number90
Relative Atomic Mass
g-factor
0.522 ± 0.0026666666666667
natural abundance
Radioactivitat☢️ radioactive element
Semivida
582 ± 4 ms
Espin3/2
nuclear quadrupole moment
0.58 ± 0.06
data de descobèrta1971
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)12.8%

146Cs

mass number146
neutron number91
Relative Atomic Mass
g-factor
-0.514 ± 0.002
natural abundance
Radioactivitat☢️ radioactive element
Semivida
321.6 ± 0.9 ms
Espin1
nuclear quadrupole moment
0.21 ± 0.03
data de descobèrta1971
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)14.2%
2n (2-neutron emission)

147Cs

mass number147
neutron number92
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
230.5 ± 0.9 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1978
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)28.5%

148Cs

mass number148
neutron number93
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
151.8 ± 1 ms
Espin2
nuclear quadrupole moment
data de descobèrta1978
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)28.7%
2n (2-neutron emission)

149Cs

mass number149
neutron number94
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
112.3 ± 2.5 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1979
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)25%
2n (2-neutron emission)

150Cs

mass number150
neutron number95
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
81 ± 2.6 ms
Espin2
nuclear quadrupole moment
data de descobèrta1979
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)44%
2n (2-neutron emission)

151Cs

mass number151
neutron number96
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
59 ± 19 ms
Espin3/2
nuclear quadrupole moment
data de descobèrta1979
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

152Cs

mass number152
neutron number97
Relative Atomic Mass
g-factor
natural abundance
Radioactivitat☢️ radioactive element
Semivida
Espin
nuclear quadrupole moment
data de descobèrta1987
parity

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Cesium

istòria

descobridor o inventaireGustov Kirchoff, Robert Bunsen
luòc de descobèrtaGermany
data de descobèrta1860
EtimologiaLatin: coesius (sky blue); for the blue lines of its spectrum.
pronunciationSEE-zi-em (English)

source

Abundance
Abundance in Earth's crust
natural abundance (Ocean)
natural abundance (còs uman)
0.000002 %
natural abundance (meteoroid)
0.000014 %
natural abundance (Solelh)
0.0000008 %
Abundance in Universe
0.00000008 %

Nuclear Screening Constants

1s1.0957
2p4.1804
2s14.4884
3d14.0194
3p18.4222
3s18.6226
4d32.1616
4p29.1424
4s27.9576
5p41.349
5s39.5555
6s48.637