Сезий

Сезий (Cs)

chemical element with symbol Cs and atomic number 55
Atomic Number55
Atomic Weight132.90545196
Адади массавӣ133
Group1
Period6
Blocks
proton55 p+
neutron78 n0
electron55 e-
Animated Bohr model of Cs (Сезий)

Хусусияти Физикӣ

Atomic Radius
260 pm
molar volume
covalent radius
232 pm
Metallic Radius
235 pm
ionic radius
167 pm
Crystal Radius
181 pm
Van der Waals radius
343 pm
зичӣ
1,873 g/cm³
Atomic Radii Of The Elements: Сезий0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

энергия
proton affinity
electron affinity
0,471626 eV/particle
ionization energy
3,893905548 eV/particle
ionization energy of Cs (Сезий)
enthalpy of vaporization
68,3 kJ/mol
гармои гудозиш
2,09 kJ/mol
standard enthalpy of formation
76,5 kJ/mol
electron
Абри электронӣ2, 8, 18, 18, 8, 1
Bohr model: Cs (Сезий)
valence electron1
Lewis structure: Cs (Сезий)
electron configuration[Xe] 6s1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1
Enhanced Bohr model of Cs (Сезий)
Orbital Diagram of Cs (Сезий)
oxidation number-1, 1
electronegativity
0.79
Electrophilicity Index
0,696095447101947 eV/particle
fundamental state of matter
phase of matterSolid
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
Ранг
Silver
appearancesilvery 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
heat capacity ratio
electrical properties
навъConductor
electrical conductivity
5 MS/m
electrical resistivity
0,0000002 m Ω
superconductivity
magnetism
навъparamagnetic
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
сохт
Crystal StructureBody Centered Cubic (BCC)
lattice constant
6,05 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
0,2 MPa
bulk modulus
1,6 GPa
shear modulus
Young's modulus
1,7 GPa
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
400,9 ± 0,7 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
29
Neutron Mass Absorption
0,0077
ададҳои квантӣ2S1/2
space group229 (Im_3m)

Isotopes of Cesium

Stable Isotopes1
Unstable Isotopes41
Natural Isotopes1

111Cs

Адади массавӣ111
neutron number56
relative atomic mass
110,953945 ± 0,000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin3/2
nuclear quadrupole moment
таърихи кашф
parity+

decay modeintensity
p (proton emission)

112Cs

Адади массавӣ112
neutron number57
relative atomic mass
111,950172 ± 0,000124 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
490 ± 30 us
spin1
nuclear quadrupole moment
таърихи кашф1994
parity+

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

113Cs

Адади массавӣ113
neutron number58
relative atomic mass
112,944428484 ± 0,000009207 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
16,94 ± 0,09 us
spin3/2
nuclear quadrupole moment
таърихи кашф1984
parity+

decay modeintensity
p (proton emission)100%

114Cs

Адади массавӣ114
neutron number59
relative atomic mass
113,941292244 ± 0,000091323 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
570 ± 20 ms
spin1
nuclear quadrupole moment
таърихи кашф1978
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

Адади массавӣ115
neutron number60
relative atomic mass
114,93591 ± 0,00011 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1,4 ± 0,8 s
spin9/2
nuclear quadrupole moment
таърихи кашф1978
parity+

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

116Cs

Адади массавӣ116
neutron number61
relative atomic mass
115,933395 ± 0,000108 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
700 ± 40 ms
spin1
nuclear quadrupole moment
таърихи кашф1975
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

Адади массавӣ117
neutron number62
relative atomic mass
116,928616723 ± 0,000067 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
8,4 ± 0,6 s
spin9/2
nuclear quadrupole moment
таърихи кашф1972
parity+

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

118Cs

Адади массавӣ118
neutron number63
relative atomic mass
117,926559517 ± 0,00001369 Da
g-factor
1,935 ± 0,0025
natural abundance
radioactivity☢️ radioactive element
half-life
14 ± 2 s
spin2
nuclear quadrupole moment
1,31 ± 0,17
таърихи кашф1969
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

Адади массавӣ119
neutron number64
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
spin9/2
nuclear quadrupole moment
2,65 ± 0,17
таърихи кашф1969
parity+

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

120Cs

Адади массавӣ120
neutron number65
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
spin2
nuclear quadrupole moment
1,36 ± 0,07
таърихи кашф1969
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

Адади массавӣ121
neutron number66
relative atomic mass
120,917227235 ± 0,00001534 Da
g-factor
0,51266666666667 ± 0,0026666666666667
natural abundance
radioactivity☢️ radioactive element
half-life
155 ± 4 s
spin3/2
nuclear quadrupole moment
0,79 ± 0,04
таърихи кашф1969
parity+

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

122Cs

Адади массавӣ122
neutron number67
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
spin1
nuclear quadrupole moment
-0,179 ± 0,01
таърихи кашф1969
parity+

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

123Cs

Адади массавӣ123
neutron number68
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
spin1/2
nuclear quadrupole moment
0
таърихи кашф1954
parity+

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

124Cs

Адади массавӣ124
neutron number69
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
spin1
nuclear quadrupole moment
-0,69 ± 0,04
таърихи кашф1969
parity+

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

125Cs

Адади массавӣ125
neutron number70
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
spin1/2
nuclear quadrupole moment
0
таърихи кашф1954
parity+

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

126Cs

Адади массавӣ126
neutron number71
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
spin1
nuclear quadrupole moment
-0,64 ± 0,03
таърихи кашф1954
parity+

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

127Cs

Адади массавӣ127
neutron number72
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
spin1/2
nuclear quadrupole moment
0
таърихи кашф1950
parity+

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

128Cs

Адади массавӣ128
neutron number73
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
spin1
nuclear quadrupole moment
-0,54 ± 0,03
таърихи кашф1951
parity+

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

129Cs

Адади массавӣ129
neutron number74
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
spin1/2
nuclear quadrupole moment
0
таърихи кашф1950
parity+

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

130Cs

Адади массавӣ130
neutron number75
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
spin1
nuclear quadrupole moment
-0,056 ± 0,006
таърихи кашф1952
parity+

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

131Cs

Адади массавӣ131
neutron number76
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
spin5/2
nuclear quadrupole moment
0,59 ± 0,02
таърихи кашф1947
parity+

decay modeintensity
ϵ (electron capture)100%

132Cs

Адади массавӣ132
neutron number77
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
spin2
nuclear quadrupole moment
0,48 ± 0,02
таърихи кашф1953
parity+

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

133Cs

Адади массавӣ133
neutron number78
relative atomic mass
132,905451958 ± 0,000000008 Da
g-factor
0,73651428571429 ± 0,0004
natural abundance
100
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin7/2
nuclear quadrupole moment
-0,00343 ± 0,0001
таърихи кашф1921
parity+

134Cs

Адади массавӣ134
neutron number79
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
spin4
nuclear quadrupole moment
0,37 ± 0,02
таърихи кашф1940
parity+

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

135Cs

Адади массавӣ135
neutron number80
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
spin7/2
nuclear quadrupole moment
0,048 ± 0,003
таърихи кашф1949
parity+

decay modeintensity
β (β decay)100%

136Cs

Адади массавӣ136
neutron number81
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
spin5
nuclear quadrupole moment
0,213 ± 0,015
таърихи кашф1951
parity+

decay modeintensity
β (β decay)100%

137Cs

Адади массавӣ137
neutron number82
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
spin7/2
nuclear quadrupole moment
0,048 ± 0,002
таърихи кашф1951
parity+

decay modeintensity
β (β decay)100%

138Cs

Адади массавӣ138
neutron number83
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
spin3
nuclear quadrupole moment
0,112 ± 0,017
таърихи кашф1943
parity-

decay modeintensity
β (β decay)100%

139Cs

Адади массавӣ139
neutron number84
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
spin7/2
nuclear quadrupole moment
-0,063 ± 0,014
таърихи кашф1939
parity+

decay modeintensity
β (β decay)100%

140Cs

Адади массавӣ140
neutron number85
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
spin1
nuclear quadrupole moment
-0,094 ± 0,015
таърихи кашф1950
parity-

decay modeintensity
β (β decay)100%

141Cs

Адади массавӣ141
neutron number86
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
spin7/2
nuclear quadrupole moment
-0,42 ± 0,07
таърихи кашф1962
parity+

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

142Cs

Адади массавӣ142
neutron number87
relative atomic mass
141,924299514 ± 0,000007586 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
1,687 ± 0,01 s
spin0
nuclear quadrupole moment
0
таърихи кашф1962
parity-

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

143Cs

Адади массавӣ143
neutron number88
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
spin3/2
nuclear quadrupole moment
0,44 ± 0,03
таърихи кашф1962
parity+

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

144Cs

Адади массавӣ144
neutron number89
relative atomic mass
143,932075402 ± 0,000021612 Da
g-factor
-0,545 ± 0,003
natural abundance
radioactivity☢️ radioactive element
half-life
994 ± 6 ms
spin1
nuclear quadrupole moment
0,29 ± 0,02
таърихи кашф1967
parity-

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

145Cs

Адади массавӣ145
neutron number90
relative atomic mass
144,935528927 ± 0,000009733 Da
g-factor
0,522 ± 0,0026666666666667
natural abundance
radioactivity☢️ radioactive element
half-life
582 ± 4 ms
spin3/2
nuclear quadrupole moment
0,58 ± 0,06
таърихи кашф1971
parity+

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

146Cs

Адади массавӣ146
neutron number91
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
spin1
nuclear quadrupole moment
0,21 ± 0,03
таърихи кашф1971
parity-

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

147Cs

Адади массавӣ147
neutron number92
relative atomic mass
146,944261512 ± 0,000009 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
230,5 ± 0,9 ms
spin3/2
nuclear quadrupole moment
таърихи кашф1978
parity+

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

148Cs

Адади массавӣ148
neutron number93
relative atomic mass
147,949639026 ± 0,000014 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
151,8 ± 1 ms
spin2
nuclear quadrupole moment
таърихи кашф1978
parity-

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

149Cs

Адади массавӣ149
neutron number94
relative atomic mass
148,953516 ± 0,000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
112,3 ± 2,5 ms
spin3/2
nuclear quadrupole moment
таърихи кашф1979
parity+

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

150Cs

Адади массавӣ150
neutron number95
relative atomic mass
149,959023 ± 0,000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
81 ± 2,6 ms
spin2
nuclear quadrupole moment
таърихи кашф1979
parity-

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

151Cs

Адади массавӣ151
neutron number96
relative atomic mass
150,963199 ± 0,000537 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
59 ± 19 ms
spin3/2
nuclear quadrupole moment
таърихи кашф1979
parity+

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

152Cs

Адади массавӣ152
neutron number97
relative atomic mass
151,968728 ± 0,000537 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin
nuclear quadrupole moment
таърихи кашф1987
parity

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

таърих

кошифGustov Kirchoff, Robert Bunsen
макони кашфGermany
таърихи кашф1860
РешашиносӣLatin: coesius (sky blue); for the blue lines of its spectrum.
pronunciationSEE-zi-em (Англисӣ)

source

Abundance
Abundance in Earth's crust
natural abundance (Уқёнус)
0,0003 mg/L
natural abundance (human body)
0,000002 %
natural abundance (meteoroid)
0,000014 %
natural abundance (Офтоб)
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