Sesium

Sesium (Cs)

chemical element with symbol Cs and atomic number 55
Atomic Number55
Atomic Weight132.90545196
Nombor jisim133
Group1
Period6
Blocks
proton55 p+
neutron78 n0
Elektron55 e-
Animated Model Bohr of Cs (Sesium)

Sifat Fizikal

Jejari Atom
260 pm
molar volume
Jejari kovalen
232 pm
Metallic Radius
235 pm
ionic radius
167 pm
Crystal Radius
181 pm
Jejari van der Waals
343 pm
ketumpatan
1.873 g/cm³
Atomic Radii Of The Elements: Sesium0255075100125150175200225250275300325350pmJejari AtomJejari KovalenMetallic RadiusJejari van der Waals

Sifat Kimia

tenaga
proton affinity
Pertalian elektron
0.471626 eV/particle
ionization energy
3.893905548 eV/particle
ionization energy of Cs (Sesium)
Entalpi pengewapan
68.3 kJ/mol
entalpi pelakuran
2.09 kJ/mol
standard enthalpy of formation
76.5 kJ/mol
Elektron
Petala elektron2, 8, 18, 18, 8, 1
Model Bohr: Cs (Sesium)
Elektron valens1
Teori ion Lewis: Cs (Sesium)
tatarajah elektron[Xe] 6s1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1
Enhanced Model Bohr of Cs (Sesium)
Orbital Diagram of Cs (Sesium)
Keadaan pengoksidaan-1, 1
Keelektronegatifan
0.79
Electrophilicity Index
0.696095447101947 eV/particle
keadaan jirim asas
fasa jirimSolid
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
rupa
warna
Silver
rupasilvery gold
indeks biasan
sifat bahan
Thermal Conductivity
35.9 W/(m K)
Pengembangan terma
molar heat capacity
32.21 J/(mol K)
Specific Heat Capacity
0.242 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
Kekonduksian elektrik
5 MS/m
Kerintangan dan kekonduksian elektrik
0.0000002 m Ω
Kesuperkonduksian
kemagnetan
typeparamagnetic
magnetic susceptibility (Mass)
0.0000000028 m³/Kg
magnetic susceptibility (Molar)
0.000000000372 m³/mol
magnetic susceptibility (Volume)
0.00000526
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal StructureBody Centered Cubic (BCC)
lattice constant
6.05 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
0.2 MPa
Modulus pukal
1.6 GPa
shear modulus
Young's modulus
1.7 GPa
Nisbah Poisson
Kelajuan bunyi
pengelasan
CategoryAlkali metals, Alkali metals
CAS GroupIA
IUPAC GroupIA
Glawe Number8
Mendeleev Number5
Pettifor Number8
Geochemical Classalkali metal
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
400.9 ± 0.7 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
29
Neutron Mass Absorption
0.0077
Nombor kuantum2S1/2
space group229 (Im_3m)

Isotopes of Cesium

Stable Isotopes1
Unstable Isotopes41
Natural Isotopes1

111Cs

Nombor jisim111
nombor neutron56
jisim atom relatif
110.953945 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
Spin3/2
nuclear quadrupole moment
tarikh penemuan
parity+

decay modeKeamatan (fizik)
p (proton emission)

112Cs

Nombor jisim112
nombor neutron57
jisim atom relatif
111.950172 ± 0.000124 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
490 ± 30 us
Spin1
nuclear quadrupole moment
tarikh penemuan1994
parity+

decay modeKeamatan (fizik)
p (proton emission)100%
α (α emission)0.26%

113Cs

Nombor jisim113
nombor neutron58
jisim atom relatif
112.944428484 ± 0.000009207 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
16.94 ± 0.09 us
Spin3/2
nuclear quadrupole moment
tarikh penemuan1984
parity+

decay modeKeamatan (fizik)
p (proton emission)100%

114Cs

Nombor jisim114
nombor neutron59
jisim atom relatif
113.941292244 ± 0.000091323 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
570 ± 20 ms
Spin1
nuclear quadrupole moment
tarikh penemuan1978
parity+

decay modeKeamatan (fizik)
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

Nombor jisim115
nombor neutron60
jisim atom relatif
114.93591 ± 0.00011 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
1.4 ± 0.8 s
Spin9/2
nuclear quadrupole moment
tarikh penemuan1978
parity+

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

116Cs

Nombor jisim116
nombor neutron61
jisim atom relatif
115.933395 ± 0.000108 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
700 ± 40 ms
Spin1
nuclear quadrupole moment
tarikh penemuan1975
parity+

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

117Cs

Nombor jisim117
nombor neutron62
jisim atom relatif
116.928616723 ± 0.000067 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
8.4 ± 0.6 s
Spin9/2
nuclear quadrupole moment
tarikh penemuan1972
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

118Cs

Nombor jisim118
nombor neutron63
jisim atom relatif
117.926559517 ± 0.00001369 Da
g-factor
1.935 ± 0.0025
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
14 ± 2 s
Spin2
nuclear quadrupole moment
1.31 ± 0.17
tarikh penemuan1969
parity+

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

119Cs

Nombor jisim119
nombor neutron64
jisim atom relatif
118.922377327 ± 0.000014965 Da
g-factor
1.2111111111111 ± 0.0066666666666667
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
43 ± 0.2 s
Spin9/2
nuclear quadrupole moment
2.65 ± 0.17
tarikh penemuan1969
parity+

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

120Cs

Nombor jisim120
nombor neutron65
jisim atom relatif
119.920677277 ± 0.000010702 Da
g-factor
1.93 ± 0.01
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
60.4 ± 0.6 s
Spin2
nuclear quadrupole moment
1.36 ± 0.07
tarikh penemuan1969
parity+

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

121Cs

Nombor jisim121
nombor neutron66
jisim atom relatif
120.917227235 ± 0.00001534 Da
g-factor
0.51266666666667 ± 0.0026666666666667
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
155 ± 4 s
Spin3/2
nuclear quadrupole moment
0.79 ± 0.04
tarikh penemuan1969
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

122Cs

Nombor jisim122
nombor neutron67
jisim atom relatif
121.916108144 ± 0.000036164 Da
g-factor
0.133 ± 0.002
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
21.18 ± 0.19 s
Spin1
nuclear quadrupole moment
-0.179 ± 0.01
tarikh penemuan1969
parity+

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

123Cs

Nombor jisim123
nombor neutron68
jisim atom relatif
122.91299606 ± 0.000013 Da
g-factor
2.75 ± 0.014
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
5.88 ± 0.03 m
Spin1/2
nuclear quadrupole moment
0
tarikh penemuan1954
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

124Cs

Nombor jisim124
nombor neutron69
jisim atom relatif
123.912247366 ± 0.000009823 Da
g-factor
0.672 ± 0.003
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
30.9 ± 0.4 s
Spin1
nuclear quadrupole moment
-0.69 ± 0.04
tarikh penemuan1969
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

125Cs

Nombor jisim125
nombor neutron70
jisim atom relatif
124.909725953 ± 0.000008304 Da
g-factor
2.814 ± 0.014
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
44.35 ± 0.29 m
Spin1/2
nuclear quadrupole moment
0
tarikh penemuan1954
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

126Cs

Nombor jisim126
nombor neutron71
jisim atom relatif
125.909445821 ± 0.00001112 Da
g-factor
0.776 ± 0.004
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
1.64 ± 0.02 m
Spin1
nuclear quadrupole moment
-0.64 ± 0.03
tarikh penemuan1954
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

127Cs

Nombor jisim127
nombor neutron72
jisim atom relatif
126.907417527 ± 0.000005987 Da
g-factor
2.914 ± 0.014
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
6.25 ± 0.1 h
Spin1/2
nuclear quadrupole moment
0
tarikh penemuan1950
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

128Cs

Nombor jisim128
nombor neutron73
jisim atom relatif
127.907748452 ± 0.000005771 Da
g-factor
0.972 ± 0.005
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
3.64 ± 0.014 m
Spin1
nuclear quadrupole moment
-0.54 ± 0.03
tarikh penemuan1951
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

129Cs

Nombor jisim129
nombor neutron74
jisim atom relatif
128.90606591 ± 0.000004888 Da
g-factor
2.978 ± 0.016
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
32.06 ± 0.06 h
Spin1/2
nuclear quadrupole moment
0
tarikh penemuan1950
parity+

decay modeKeamatan (fizik)
β+ (β+ decay; β+ = ϵ + e+)100%

130Cs

Nombor jisim130
nombor neutron75
jisim atom relatif
129.906709281 ± 0.000008971 Da
g-factor
1.458 ± 0.007
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
29.21 ± 0.04 m
Spin1
nuclear quadrupole moment
-0.056 ± 0.006
tarikh penemuan1952
parity+

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

131Cs

Nombor jisim131
nombor neutron76
jisim atom relatif
130.905468457 ± 0.00000019 Da
g-factor
1.4144 ± 0.0012
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
9.689 ± 0.016 d
Spin5/2
nuclear quadrupole moment
0.59 ± 0.02
tarikh penemuan1947
parity+

decay modeKeamatan (fizik)
ϵ (electron capture)100%

132Cs

Nombor jisim132
nombor neutron77
jisim atom relatif
131.90643774 ± 0.000001112 Da
g-factor
1.1095 ± 0.0035
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
6.48 ± 0.006 d
Spin2
nuclear quadrupole moment
0.48 ± 0.02
tarikh penemuan1953
parity+

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

133Cs

Nombor jisim133
nombor neutron78
jisim atom relatif
132.905451958 ± 0.000000008 Da
g-factor
0.73651428571429 ± 0.0004
natural abundance
100
Reputan radioaktifIsotop stabil
setengah hayatNot Radioactive ☢️
Spin7/2
nuclear quadrupole moment
-0.00343 ± 0.0001
tarikh penemuan1921
parity+

134Cs

Nombor jisim134
nombor neutron79
jisim atom relatif
133.906718501 ± 0.000000017 Da
g-factor
0.747325 ± 0.00035
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
2.065 ± 0.0004 y
Spin4
nuclear quadrupole moment
0.37 ± 0.02
tarikh penemuan1940
parity+

decay modeKeamatan (fizik)
β (β decay)100%
ϵ (electron capture)0.0003%

135Cs

Nombor jisim135
nombor neutron80
jisim atom relatif
134.905976907 ± 0.00000039 Da
g-factor
0.77951428571429 ± 0.00037142857142857
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
1.33 ± 0.19 My
Spin7/2
nuclear quadrupole moment
0.048 ± 0.003
tarikh penemuan1949
parity+

decay modeKeamatan (fizik)
β (β decay)100%

136Cs

Nombor jisim136
nombor neutron81
jisim atom relatif
135.907311431 ± 0.00000201 Da
g-factor
0.741 ± 0.003
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
13.01 ± 0.05 d
Spin5
nuclear quadrupole moment
0.213 ± 0.015
tarikh penemuan1951
parity+

decay modeKeamatan (fizik)
β (β decay)100%

137Cs

Nombor jisim137
nombor neutron82
jisim atom relatif
136.907089296 ± 0.000000324 Da
g-factor
0.81068571428571 ± 0.0004
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
30.04 ± 0.04 y
Spin7/2
nuclear quadrupole moment
0.048 ± 0.002
tarikh penemuan1951
parity+

decay modeKeamatan (fizik)
β (β decay)100%

138Cs

Nombor jisim138
nombor neutron83
jisim atom relatif
137.911017119 ± 0.000009831 Da
g-factor
0.233 ± 0.0013333333333333
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
33.5 ± 0.2 m
Spin3
nuclear quadrupole moment
0.112 ± 0.017
tarikh penemuan1943
parity-

decay modeKeamatan (fizik)
β (β decay)100%

139Cs

Nombor jisim139
nombor neutron84
jisim atom relatif
138.913363822 ± 0.000003364 Da
g-factor
0.768 ± 0.0011428571428571
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
9.27 ± 0.05 m
Spin7/2
nuclear quadrupole moment
-0.063 ± 0.014
tarikh penemuan1939
parity+

decay modeKeamatan (fizik)
β (β decay)100%

140Cs

Nombor jisim140
nombor neutron85
jisim atom relatif
139.917283707 ± 0.000008801 Da
g-factor
0.134 ± 0.001
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
63.7 ± 0.3 s
Spin1
nuclear quadrupole moment
-0.094 ± 0.015
tarikh penemuan1950
parity-

decay modeKeamatan (fizik)
β (β decay)100%

141Cs

Nombor jisim141
nombor neutron86
jisim atom relatif
140.920045279 ± 0.000009871 Da
g-factor
0.69457142857143 ± 0.0028571428571429
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
24.84 ± 0.16 s
Spin7/2
nuclear quadrupole moment
-0.42 ± 0.07
tarikh penemuan1962
parity+

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

142Cs

Nombor jisim142
nombor neutron87
jisim atom relatif
141.924299514 ± 0.000007586 Da
g-factor
0
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
1.687 ± 0.01 s
Spin0
nuclear quadrupole moment
0
tarikh penemuan1962
parity-

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

143Cs

Nombor jisim143
nombor neutron88
jisim atom relatif
142.927347346 ± 0.00000813 Da
g-factor
0.57933333333333 ± 0.0026666666666667
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
1.802 ± 0.008 s
Spin3/2
nuclear quadrupole moment
0.44 ± 0.03
tarikh penemuan1962
parity+

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

144Cs

Nombor jisim144
nombor neutron89
jisim atom relatif
143.932075402 ± 0.000021612 Da
g-factor
-0.545 ± 0.003
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
994 ± 6 ms
Spin1
nuclear quadrupole moment
0.29 ± 0.02
tarikh penemuan1967
parity-

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

145Cs

Nombor jisim145
nombor neutron90
jisim atom relatif
144.935528927 ± 0.000009733 Da
g-factor
0.522 ± 0.0026666666666667
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
582 ± 4 ms
Spin3/2
nuclear quadrupole moment
0.58 ± 0.06
tarikh penemuan1971
parity+

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

146Cs

Nombor jisim146
nombor neutron91
jisim atom relatif
145.940621867 ± 0.000003106 Da
g-factor
-0.514 ± 0.002
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
321.6 ± 0.9 ms
Spin1
nuclear quadrupole moment
0.21 ± 0.03
tarikh penemuan1971
parity-

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

147Cs

Nombor jisim147
nombor neutron92
jisim atom relatif
146.944261512 ± 0.000009 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
230.5 ± 0.9 ms
Spin3/2
nuclear quadrupole moment
tarikh penemuan1978
parity+

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

148Cs

Nombor jisim148
nombor neutron93
jisim atom relatif
147.949639026 ± 0.000014 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
151.8 ± 1 ms
Spin2
nuclear quadrupole moment
tarikh penemuan1978
parity-

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

149Cs

Nombor jisim149
nombor neutron94
jisim atom relatif
148.953516 ± 0.000429 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
112.3 ± 2.5 ms
Spin3/2
nuclear quadrupole moment
tarikh penemuan1979
parity+

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

150Cs

Nombor jisim150
nombor neutron95
jisim atom relatif
149.959023 ± 0.000429 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
81 ± 2.6 ms
Spin2
nuclear quadrupole moment
tarikh penemuan1979
parity-

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

151Cs

Nombor jisim151
nombor neutron96
jisim atom relatif
150.963199 ± 0.000537 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
59 ± 19 ms
Spin3/2
nuclear quadrupole moment
tarikh penemuan1979
parity+

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

152Cs

Nombor jisim152
nombor neutron97
jisim atom relatif
151.968728 ± 0.000537 Da
g-factor
natural abundance
Reputan radioaktif☢️ radioactive element
setengah hayat
Spin
nuclear quadrupole moment
tarikh penemuan1987
parity

decay modeKeamatan (fizik)
β (β decay)
β n (β-delayed neutron emission)
Cesium

sejarah

penemu atau perekaGustov Kirchoff, Robert Bunsen
tempat penemuanGermany
tarikh penemuan1860
EtimologiLatin: coesius (sky blue); for the blue lines of its spectrum.
sebutanSEE-zi-em (Inggeris)

sumber

Abundance
Abundance in Earth's crust
natural abundance (lautan)
0.0003 mg/L
natural abundance (Tubuh manusia)
0.000002 %
natural abundance (Meteoroid)
0.000014 %
natural abundance (Matahari)
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