Cezium

Cezium (Cs)

chemical element with symbol Cs and atomic number 55
Atomic Number55
Atomic Weight132.90545196
Numri i masës133
Group1
Period6
Blocks
protoni55 p+
neutroni78 n0
elektroni55 e-
Animated Bohr model of Cs (Cezium)

Tipar Fizik

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
density
1,873 g/cm³
Atomic Radii Of The Elements: Cezium0255075100125150175200225250275300325350pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energjia
proton affinity
electron affinity
0,471626 eV/particle
ionization energy
3,893905548 eV/particle
ionization energy of Cs (Cezium)
enthalpy of vaporization
68,3 kJ/mol
enthalpy of fusion
2,09 kJ/mol
standard enthalpy of formation
76,5 kJ/mol
elektroni
electron shell2, 8, 18, 18, 8, 1
Bohr model: Cs (Cezium)
valence electron1
Lewis structure: Cs (Cezium)
konfigurimi i elektronit[Xe] 6s1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1
Enhanced Bohr model of Cs (Cezium)
Orbital Diagram of Cs (Cezium)
oxidation number-1, 1
Elektronegativiteti
0.79
Electrophilicity Index
0,696095447101947 eV/particle
fundamental state of matter
gjendja agregate e materiesSolid
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
Ngjyra
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
0,242 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
5 MS/m
electrical resistivity
0,0000002 m Ω
Superpërcjellshmëria
Magnetizimi
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
strukturë
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
Shpejtësia e zërit
klasifikim
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
numër kuantik2S1/2
space group229 (Im_3m)

Isotopes of Cesium

Stable Isotopes1
Unstable Isotopes41
Natural Isotopes1

111Cs

Numri i masës111
numri i neutroneve56
relative atomic mass
110,953945 ± 0,000215 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity+

decay modeintensitet
p (proton emission)

112Cs

Numri i masës112
numri i neutroneve57
relative atomic mass
111,950172 ± 0,000124 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
490 ± 30 us
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes1994
parity+

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

113Cs

Numri i masës113
numri i neutroneve58
relative atomic mass
112,944428484 ± 0,000009207 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
16,94 ± 0,09 us
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1984
parity+

decay modeintensitet
p (proton emission)100%

114Cs

Numri i masës114
numri i neutroneve59
relative atomic mass
113,941292244 ± 0,000091323 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
570 ± 20 ms
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes1978
parity+

decay modeintensitet
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

Numri i masës115
numri i neutroneve60
relative atomic mass
114,93591 ± 0,00011 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,4 ± 0,8 s
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1978
parity+

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

116Cs

Numri i masës116
numri i neutroneve61
relative atomic mass
115,933395 ± 0,000108 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
700 ± 40 ms
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes1975
parity+

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

117Cs

Numri i masës117
numri i neutroneve62
relative atomic mass
116,928616723 ± 0,000067 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
8,4 ± 0,6 s
Spini9/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1972
parity+

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

118Cs

Numri i masës118
numri i neutroneve63
relative atomic mass
117,926559517 ± 0,00001369 Da
g-factor
1,935 ± 0,0025
natural abundance
Radioaktivitet☢️ radioactive element
half-life
14 ± 2 s
Spini2
nuclear quadrupole moment
1,31 ± 0,17
koha e zbulimit apo shpikjes1969
parity+

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

119Cs

Numri i masës119
numri i neutroneve64
relative atomic mass
118,922377327 ± 0,000014965 Da
g-factor
1,2111111111111 ± 0,0066666666666667
natural abundance
Radioaktivitet☢️ radioactive element
half-life
43 ± 0,2 s
Spini9/2
nuclear quadrupole moment
2,65 ± 0,17
koha e zbulimit apo shpikjes1969
parity+

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

120Cs

Numri i masës120
numri i neutroneve65
relative atomic mass
119,920677277 ± 0,000010702 Da
g-factor
1,93 ± 0,01
natural abundance
Radioaktivitet☢️ radioactive element
half-life
60,4 ± 0,6 s
Spini2
nuclear quadrupole moment
1,36 ± 0,07
koha e zbulimit apo shpikjes1969
parity+

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

121Cs

Numri i masës121
numri i neutroneve66
relative atomic mass
120,917227235 ± 0,00001534 Da
g-factor
0,51266666666667 ± 0,0026666666666667
natural abundance
Radioaktivitet☢️ radioactive element
half-life
155 ± 4 s
Spini3/2
nuclear quadrupole moment
0,79 ± 0,04
koha e zbulimit apo shpikjes1969
parity+

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

122Cs

Numri i masës122
numri i neutroneve67
relative atomic mass
121,916108144 ± 0,000036164 Da
g-factor
0,133 ± 0,002
natural abundance
Radioaktivitet☢️ radioactive element
half-life
21,18 ± 0,19 s
Spini1
nuclear quadrupole moment
-0,179 ± 0,01
koha e zbulimit apo shpikjes1969
parity+

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

123Cs

Numri i masës123
numri i neutroneve68
relative atomic mass
122,91299606 ± 0,000013 Da
g-factor
2,75 ± 0,014
natural abundance
Radioaktivitet☢️ radioactive element
half-life
5,88 ± 0,03 m
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1954
parity+

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

124Cs

Numri i masës124
numri i neutroneve69
relative atomic mass
123,912247366 ± 0,000009823 Da
g-factor
0,672 ± 0,003
natural abundance
Radioaktivitet☢️ radioactive element
half-life
30,9 ± 0,4 s
Spini1
nuclear quadrupole moment
-0,69 ± 0,04
koha e zbulimit apo shpikjes1969
parity+

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

125Cs

Numri i masës125
numri i neutroneve70
relative atomic mass
124,909725953 ± 0,000008304 Da
g-factor
2,814 ± 0,014
natural abundance
Radioaktivitet☢️ radioactive element
half-life
44,35 ± 0,29 m
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1954
parity+

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

126Cs

Numri i masës126
numri i neutroneve71
relative atomic mass
125,909445821 ± 0,00001112 Da
g-factor
0,776 ± 0,004
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,64 ± 0,02 m
Spini1
nuclear quadrupole moment
-0,64 ± 0,03
koha e zbulimit apo shpikjes1954
parity+

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

127Cs

Numri i masës127
numri i neutroneve72
relative atomic mass
126,907417527 ± 0,000005987 Da
g-factor
2,914 ± 0,014
natural abundance
Radioaktivitet☢️ radioactive element
half-life
6,25 ± 0,1 h
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1950
parity+

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

128Cs

Numri i masës128
numri i neutroneve73
relative atomic mass
127,907748452 ± 0,000005771 Da
g-factor
0,972 ± 0,005
natural abundance
Radioaktivitet☢️ radioactive element
half-life
3,64 ± 0,014 m
Spini1
nuclear quadrupole moment
-0,54 ± 0,03
koha e zbulimit apo shpikjes1951
parity+

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

129Cs

Numri i masës129
numri i neutroneve74
relative atomic mass
128,90606591 ± 0,000004888 Da
g-factor
2,978 ± 0,016
natural abundance
Radioaktivitet☢️ radioactive element
half-life
32,06 ± 0,06 h
Spini1/2
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1950
parity+

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

130Cs

Numri i masës130
numri i neutroneve75
relative atomic mass
129,906709281 ± 0,000008971 Da
g-factor
1,458 ± 0,007
natural abundance
Radioaktivitet☢️ radioactive element
half-life
29,21 ± 0,04 m
Spini1
nuclear quadrupole moment
-0,056 ± 0,006
koha e zbulimit apo shpikjes1952
parity+

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

131Cs

Numri i masës131
numri i neutroneve76
relative atomic mass
130,905468457 ± 0,00000019 Da
g-factor
1,4144 ± 0,0012
natural abundance
Radioaktivitet☢️ radioactive element
half-life
9,689 ± 0,016 d
Spini5/2
nuclear quadrupole moment
0,59 ± 0,02
koha e zbulimit apo shpikjes1947
parity+

decay modeintensitet
ϵ (electron capture)100%

132Cs

Numri i masës132
numri i neutroneve77
relative atomic mass
131,90643774 ± 0,000001112 Da
g-factor
1,1095 ± 0,0035
natural abundance
Radioaktivitet☢️ radioactive element
half-life
6,48 ± 0,006 d
Spini2
nuclear quadrupole moment
0,48 ± 0,02
koha e zbulimit apo shpikjes1953
parity+

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

133Cs

Numri i masës133
numri i neutroneve78
relative atomic mass
132,905451958 ± 0,000000008 Da
g-factor
0,73651428571429 ± 0,0004
natural abundance
100
Radioaktivitetstable isotope
half-lifeNot Radioactive ☢️
Spini7/2
nuclear quadrupole moment
-0,00343 ± 0,0001
koha e zbulimit apo shpikjes1921
parity+

134Cs

Numri i masës134
numri i neutroneve79
relative atomic mass
133,906718501 ± 0,000000017 Da
g-factor
0,747325 ± 0,00035
natural abundance
Radioaktivitet☢️ radioactive element
half-life
2,065 ± 0,0004 y
Spini4
nuclear quadrupole moment
0,37 ± 0,02
koha e zbulimit apo shpikjes1940
parity+

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

135Cs

Numri i masës135
numri i neutroneve80
relative atomic mass
134,905976907 ± 0,00000039 Da
g-factor
0,77951428571429 ± 0,00037142857142857
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,33 ± 0,19 My
Spini7/2
nuclear quadrupole moment
0,048 ± 0,003
koha e zbulimit apo shpikjes1949
parity+

decay modeintensitet
β (β decay)100%

136Cs

Numri i masës136
numri i neutroneve81
relative atomic mass
135,907311431 ± 0,00000201 Da
g-factor
0,741 ± 0,003
natural abundance
Radioaktivitet☢️ radioactive element
half-life
13,01 ± 0,05 d
Spini5
nuclear quadrupole moment
0,213 ± 0,015
koha e zbulimit apo shpikjes1951
parity+

decay modeintensitet
β (β decay)100%

137Cs

Numri i masës137
numri i neutroneve82
relative atomic mass
136,907089296 ± 0,000000324 Da
g-factor
0,81068571428571 ± 0,0004
natural abundance
Radioaktivitet☢️ radioactive element
half-life
30,04 ± 0,04 y
Spini7/2
nuclear quadrupole moment
0,048 ± 0,002
koha e zbulimit apo shpikjes1951
parity+

decay modeintensitet
β (β decay)100%

138Cs

Numri i masës138
numri i neutroneve83
relative atomic mass
137,911017119 ± 0,000009831 Da
g-factor
0,233 ± 0,0013333333333333
natural abundance
Radioaktivitet☢️ radioactive element
half-life
33,5 ± 0,2 m
Spini3
nuclear quadrupole moment
0,112 ± 0,017
koha e zbulimit apo shpikjes1943
parity-

decay modeintensitet
β (β decay)100%

139Cs

Numri i masës139
numri i neutroneve84
relative atomic mass
138,913363822 ± 0,000003364 Da
g-factor
0,768 ± 0,0011428571428571
natural abundance
Radioaktivitet☢️ radioactive element
half-life
9,27 ± 0,05 m
Spini7/2
nuclear quadrupole moment
-0,063 ± 0,014
koha e zbulimit apo shpikjes1939
parity+

decay modeintensitet
β (β decay)100%

140Cs

Numri i masës140
numri i neutroneve85
relative atomic mass
139,917283707 ± 0,000008801 Da
g-factor
0,134 ± 0,001
natural abundance
Radioaktivitet☢️ radioactive element
half-life
63,7 ± 0,3 s
Spini1
nuclear quadrupole moment
-0,094 ± 0,015
koha e zbulimit apo shpikjes1950
parity-

decay modeintensitet
β (β decay)100%

141Cs

Numri i masës141
numri i neutroneve86
relative atomic mass
140,920045279 ± 0,000009871 Da
g-factor
0,69457142857143 ± 0,0028571428571429
natural abundance
Radioaktivitet☢️ radioactive element
half-life
24,84 ± 0,16 s
Spini7/2
nuclear quadrupole moment
-0,42 ± 0,07
koha e zbulimit apo shpikjes1962
parity+

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

142Cs

Numri i masës142
numri i neutroneve87
relative atomic mass
141,924299514 ± 0,000007586 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,687 ± 0,01 s
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes1962
parity-

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

143Cs

Numri i masës143
numri i neutroneve88
relative atomic mass
142,927347346 ± 0,00000813 Da
g-factor
0,57933333333333 ± 0,0026666666666667
natural abundance
Radioaktivitet☢️ radioactive element
half-life
1,802 ± 0,008 s
Spini3/2
nuclear quadrupole moment
0,44 ± 0,03
koha e zbulimit apo shpikjes1962
parity+

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

144Cs

Numri i masës144
numri i neutroneve89
relative atomic mass
143,932075402 ± 0,000021612 Da
g-factor
-0,545 ± 0,003
natural abundance
Radioaktivitet☢️ radioactive element
half-life
994 ± 6 ms
Spini1
nuclear quadrupole moment
0,29 ± 0,02
koha e zbulimit apo shpikjes1967
parity-

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

145Cs

Numri i masës145
numri i neutroneve90
relative atomic mass
144,935528927 ± 0,000009733 Da
g-factor
0,522 ± 0,0026666666666667
natural abundance
Radioaktivitet☢️ radioactive element
half-life
582 ± 4 ms
Spini3/2
nuclear quadrupole moment
0,58 ± 0,06
koha e zbulimit apo shpikjes1971
parity+

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

146Cs

Numri i masës146
numri i neutroneve91
relative atomic mass
145,940621867 ± 0,000003106 Da
g-factor
-0,514 ± 0,002
natural abundance
Radioaktivitet☢️ radioactive element
half-life
321,6 ± 0,9 ms
Spini1
nuclear quadrupole moment
0,21 ± 0,03
koha e zbulimit apo shpikjes1971
parity-

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

147Cs

Numri i masës147
numri i neutroneve92
relative atomic mass
146,944261512 ± 0,000009 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
230,5 ± 0,9 ms
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1978
parity+

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

148Cs

Numri i masës148
numri i neutroneve93
relative atomic mass
147,949639026 ± 0,000014 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
151,8 ± 1 ms
Spini2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1978
parity-

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

149Cs

Numri i masës149
numri i neutroneve94
relative atomic mass
148,953516 ± 0,000429 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
112,3 ± 2,5 ms
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1979
parity+

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

150Cs

Numri i masës150
numri i neutroneve95
relative atomic mass
149,959023 ± 0,000429 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
81 ± 2,6 ms
Spini2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1979
parity-

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

151Cs

Numri i masës151
numri i neutroneve96
relative atomic mass
150,963199 ± 0,000537 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
59 ± 19 ms
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1979
parity+

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

152Cs

Numri i masës152
numri i neutroneve97
relative atomic mass
151,968728 ± 0,000537 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini
nuclear quadrupole moment
koha e zbulimit apo shpikjes1987
parity

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

historia

zbuluesGustov Kirchoff, Robert Bunsen
vendndodhja e zbulimitGermany
koha e zbulimit apo shpikjes1860
EtimologjiaLatin: coesius (sky blue); for the blue lines of its spectrum.
pronunciationSEE-zi-em (anglisht)

burim

Abundance
Abundance in Earth's crust
natural abundance (Oqeani)
0,0003 mg/L
natural abundance (Trupi i njeriut)
0,000002 %
natural abundance (meteoroid)
0,000014 %
natural abundance (Diell)
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