Cezij[um]

Cezij[um] (Cs)

hemijski element sa simbolom Cs i atomskim brojem 55
Atomic Number55
Atomic Weight132.90545196
Maseni broj133
Group1
Period6
Blocks
Proton55 p+
Neutron78 n0
Elektron55 e-
Animated Bohrov model atoma of Cs (Cezij[um])

Physical Property

Atomski Radijus
260 pm
Molarni volumen
covalent radius
232 pm
Metallic Radius
235 pm
Ionski radijus
167 pm
Crystal Radius
181 pm
Van der Waalsov radijus
343 pm
gustoća
1,873 g/cm³
Atomic Radii Of The Elements: Cezij[um]0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350pmAtomski RadijusCovalent RadiusMetallic RadiusVan der Waalsov radijus

Chemical Property

energija
proton affinity
electron affinity
0,471626 eV/particle
ionization energy
3,893905548 eV/particle
ionization energy of Cs (Cezij[um])
Toplota isparavanja
68,3 kJ/mol
toplota topljenja
2,09 kJ/mol
standard enthalpy of formation
76,5 kJ/mol
Elektron
electron shell2, 8, 18, 18, 8, 1
Bohrov model atoma: Cs (Cezij[um])
Valentni elektron1
Lewis structure: Cs (Cezij[um])
electron configuration[Xe] 6s1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1
Enhanced Bohrov model atoma of Cs (Cezij[um])
Orbital Diagram of Cs (Cezij[um])
oksidacijsko stanje-1, 1
Elektronegativnost
0.79
Electrophilicity Index
0,696095447101947 eV/particle
fundamental state of matter
agregatno stanjeSolid
gaseous state of matter
Boiling Point
944,15 K
Melting Point
301,65 K
critical pressure
9,4 MPa
Kritična temperatura
1.938,15 K
Trojna tačka
appearance
boja
Silver
appearancesilvery gold
Indeks prelamanja
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
Specifična električna provodljivost
5 MS/m
electrical resistivity
0,0000002 m Ω
Superprovodljivost
Magnetizam
typeparamagnetic
magnetic susceptibility (Mass)
0,0000000028 m³/Kg
magnetic susceptibility (Molar)
0,000000000372 m³/mol
magnetic susceptibility (Volume)
0,00000526
magnetic ordering
Kirijeva tačka
Néel temperature
struktura
Crystal StructureBody Centered Cubic (BCC)
lattice constant
6,05 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
Tvrdoća
0,2 MPa
bulk modulus
1,6 GPa
shear modulus
Young's modulus
1,7 GPa
Poisson's ratio
Brzina zvuka
klasifikacija
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
Kvantni brojevi2S1/2
space group229 (Im_3m)

Isotopes of Cesium

Stable Isotopes1
Unstable Isotopes41
Natural Isotopes1

111Cs

Maseni broj111
broj neutrona56
relative atomic mass
110,953945 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin3/2
nuclear quadrupole moment
datum otkrića
parity+

decay modeintensity
p (proton emission)

112Cs

Maseni broj112
broj neutrona57
relative atomic mass
111,950172 ± 0,000124 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
490 ± 30 us
spin1
nuclear quadrupole moment
datum otkrića1994
parity+

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

113Cs

Maseni broj113
broj neutrona58
relative atomic mass
112,944428484 ± 0,000009207 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
16,94 ± 0,09 us
spin3/2
nuclear quadrupole moment
datum otkrića1984
parity+

decay modeintensity
p (proton emission)100%

114Cs

Maseni broj114
broj neutrona59
relative atomic mass
113,941292244 ± 0,000091323 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
570 ± 20 ms
spin1
nuclear quadrupole moment
datum otkrića1978
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

Maseni broj115
broj neutrona60
relative atomic mass
114,93591 ± 0,00011 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,4 ± 0,8 s
spin9/2
nuclear quadrupole moment
datum otkrića1978
parity+

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

116Cs

Maseni broj116
broj neutrona61
relative atomic mass
115,933395 ± 0,000108 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
700 ± 40 ms
spin1
nuclear quadrupole moment
datum otkrića1975
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

Maseni broj117
broj neutrona62
relative atomic mass
116,928616723 ± 0,000067 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
8,4 ± 0,6 s
spin9/2
nuclear quadrupole moment
datum otkrića1972
parity+

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

118Cs

Maseni broj118
broj neutrona63
relative atomic mass
117,926559517 ± 0,00001369 Da
g-factor
1,935 ± 0,0025
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
14 ± 2 s
spin2
nuclear quadrupole moment
1,31 ± 0,17
datum otkrića1969
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

Maseni broj119
broj neutrona64
relative atomic mass
118,922377327 ± 0,000014965 Da
g-factor
1,2111111111111 ± 0,0066666666666667
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
43 ± 0,2 s
spin9/2
nuclear quadrupole moment
2,65 ± 0,17
datum otkrića1969
parity+

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

120Cs

Maseni broj120
broj neutrona65
relative atomic mass
119,920677277 ± 0,000010702 Da
g-factor
1,93 ± 0,01
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
60,4 ± 0,6 s
spin2
nuclear quadrupole moment
1,36 ± 0,07
datum otkrića1969
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

Maseni broj121
broj neutrona66
relative atomic mass
120,917227235 ± 0,00001534 Da
g-factor
0,51266666666667 ± 0,0026666666666667
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
155 ± 4 s
spin3/2
nuclear quadrupole moment
0,79 ± 0,04
datum otkrića1969
parity+

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

122Cs

Maseni broj122
broj neutrona67
relative atomic mass
121,916108144 ± 0,000036164 Da
g-factor
0,133 ± 0,002
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
21,18 ± 0,19 s
spin1
nuclear quadrupole moment
-0,179 ± 0,01
datum otkrića1969
parity+

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

123Cs

Maseni broj123
broj neutrona68
relative atomic mass
122,91299606 ± 0,000013 Da
g-factor
2,75 ± 0,014
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
5,88 ± 0,03 m
spin1/2
nuclear quadrupole moment
0
datum otkrića1954
parity+

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

124Cs

Maseni broj124
broj neutrona69
relative atomic mass
123,912247366 ± 0,000009823 Da
g-factor
0,672 ± 0,003
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
30,9 ± 0,4 s
spin1
nuclear quadrupole moment
-0,69 ± 0,04
datum otkrića1969
parity+

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

125Cs

Maseni broj125
broj neutrona70
relative atomic mass
124,909725953 ± 0,000008304 Da
g-factor
2,814 ± 0,014
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
44,35 ± 0,29 m
spin1/2
nuclear quadrupole moment
0
datum otkrića1954
parity+

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

126Cs

Maseni broj126
broj neutrona71
relative atomic mass
125,909445821 ± 0,00001112 Da
g-factor
0,776 ± 0,004
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,64 ± 0,02 m
spin1
nuclear quadrupole moment
-0,64 ± 0,03
datum otkrića1954
parity+

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

127Cs

Maseni broj127
broj neutrona72
relative atomic mass
126,907417527 ± 0,000005987 Da
g-factor
2,914 ± 0,014
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
6,25 ± 0,1 h
spin1/2
nuclear quadrupole moment
0
datum otkrića1950
parity+

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

128Cs

Maseni broj128
broj neutrona73
relative atomic mass
127,907748452 ± 0,000005771 Da
g-factor
0,972 ± 0,005
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
3,64 ± 0,014 m
spin1
nuclear quadrupole moment
-0,54 ± 0,03
datum otkrića1951
parity+

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

129Cs

Maseni broj129
broj neutrona74
relative atomic mass
128,90606591 ± 0,000004888 Da
g-factor
2,978 ± 0,016
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
32,06 ± 0,06 h
spin1/2
nuclear quadrupole moment
0
datum otkrića1950
parity+

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

130Cs

Maseni broj130
broj neutrona75
relative atomic mass
129,906709281 ± 0,000008971 Da
g-factor
1,458 ± 0,007
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
29,21 ± 0,04 m
spin1
nuclear quadrupole moment
-0,056 ± 0,006
datum otkrića1952
parity+

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

131Cs

Maseni broj131
broj neutrona76
relative atomic mass
130,905468457 ± 0,00000019 Da
g-factor
1,4144 ± 0,0012
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
9,689 ± 0,016 d
spin5/2
nuclear quadrupole moment
0,59 ± 0,02
datum otkrića1947
parity+

decay modeintensity
ϵ (electron capture)100%

132Cs

Maseni broj132
broj neutrona77
relative atomic mass
131,90643774 ± 0,000001112 Da
g-factor
1,1095 ± 0,0035
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
6,48 ± 0,006 d
spin2
nuclear quadrupole moment
0,48 ± 0,02
datum otkrića1953
parity+

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

133Cs

Maseni broj133
broj neutrona78
relative atomic mass
132,905451958 ± 0,000000008 Da
g-factor
0,73651428571429 ± 0,0004
natural abundance
100
Radioaktivnoststable isotope
Vrijeme poluraspadaNot Radioactive ☢️
spin7/2
nuclear quadrupole moment
-0,00343 ± 0,0001
datum otkrića1921
parity+

134Cs

Maseni broj134
broj neutrona79
relative atomic mass
133,906718501 ± 0,000000017 Da
g-factor
0,747325 ± 0,00035
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
2,065 ± 0,0004 y
spin4
nuclear quadrupole moment
0,37 ± 0,02
datum otkrića1940
parity+

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

135Cs

Maseni broj135
broj neutrona80
relative atomic mass
134,905976907 ± 0,00000039 Da
g-factor
0,77951428571429 ± 0,00037142857142857
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,33 ± 0,19 My
spin7/2
nuclear quadrupole moment
0,048 ± 0,003
datum otkrića1949
parity+

decay modeintensity
β (β decay)100%

136Cs

Maseni broj136
broj neutrona81
relative atomic mass
135,907311431 ± 0,00000201 Da
g-factor
0,741 ± 0,003
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
13,01 ± 0,05 d
spin5
nuclear quadrupole moment
0,213 ± 0,015
datum otkrića1951
parity+

decay modeintensity
β (β decay)100%

137Cs

Maseni broj137
broj neutrona82
relative atomic mass
136,907089296 ± 0,000000324 Da
g-factor
0,81068571428571 ± 0,0004
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
30,04 ± 0,04 y
spin7/2
nuclear quadrupole moment
0,048 ± 0,002
datum otkrića1951
parity+

decay modeintensity
β (β decay)100%

138Cs

Maseni broj138
broj neutrona83
relative atomic mass
137,911017119 ± 0,000009831 Da
g-factor
0,233 ± 0,0013333333333333
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
33,5 ± 0,2 m
spin3
nuclear quadrupole moment
0,112 ± 0,017
datum otkrića1943
parity-

decay modeintensity
β (β decay)100%

139Cs

Maseni broj139
broj neutrona84
relative atomic mass
138,913363822 ± 0,000003364 Da
g-factor
0,768 ± 0,0011428571428571
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
9,27 ± 0,05 m
spin7/2
nuclear quadrupole moment
-0,063 ± 0,014
datum otkrića1939
parity+

decay modeintensity
β (β decay)100%

140Cs

Maseni broj140
broj neutrona85
relative atomic mass
139,917283707 ± 0,000008801 Da
g-factor
0,134 ± 0,001
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
63,7 ± 0,3 s
spin1
nuclear quadrupole moment
-0,094 ± 0,015
datum otkrića1950
parity-

decay modeintensity
β (β decay)100%

141Cs

Maseni broj141
broj neutrona86
relative atomic mass
140,920045279 ± 0,000009871 Da
g-factor
0,69457142857143 ± 0,0028571428571429
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
24,84 ± 0,16 s
spin7/2
nuclear quadrupole moment
-0,42 ± 0,07
datum otkrića1962
parity+

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

142Cs

Maseni broj142
broj neutrona87
relative atomic mass
141,924299514 ± 0,000007586 Da
g-factor
0
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,687 ± 0,01 s
spin0
nuclear quadrupole moment
0
datum otkrića1962
parity-

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

143Cs

Maseni broj143
broj neutrona88
relative atomic mass
142,927347346 ± 0,00000813 Da
g-factor
0,57933333333333 ± 0,0026666666666667
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,802 ± 0,008 s
spin3/2
nuclear quadrupole moment
0,44 ± 0,03
datum otkrića1962
parity+

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

144Cs

Maseni broj144
broj neutrona89
relative atomic mass
143,932075402 ± 0,000021612 Da
g-factor
-0,545 ± 0,003
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
994 ± 6 ms
spin1
nuclear quadrupole moment
0,29 ± 0,02
datum otkrića1967
parity-

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

145Cs

Maseni broj145
broj neutrona90
relative atomic mass
144,935528927 ± 0,000009733 Da
g-factor
0,522 ± 0,0026666666666667
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
582 ± 4 ms
spin3/2
nuclear quadrupole moment
0,58 ± 0,06
datum otkrića1971
parity+

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

146Cs

Maseni broj146
broj neutrona91
relative atomic mass
145,940621867 ± 0,000003106 Da
g-factor
-0,514 ± 0,002
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
321,6 ± 0,9 ms
spin1
nuclear quadrupole moment
0,21 ± 0,03
datum otkrića1971
parity-

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

147Cs

Maseni broj147
broj neutrona92
relative atomic mass
146,944261512 ± 0,000009 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
230,5 ± 0,9 ms
spin3/2
nuclear quadrupole moment
datum otkrića1978
parity+

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

148Cs

Maseni broj148
broj neutrona93
relative atomic mass
147,949639026 ± 0,000014 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
151,8 ± 1 ms
spin2
nuclear quadrupole moment
datum otkrića1978
parity-

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

149Cs

Maseni broj149
broj neutrona94
relative atomic mass
148,953516 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
112,3 ± 2,5 ms
spin3/2
nuclear quadrupole moment
datum otkrića1979
parity+

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

150Cs

Maseni broj150
broj neutrona95
relative atomic mass
149,959023 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
81 ± 2,6 ms
spin2
nuclear quadrupole moment
datum otkrića1979
parity-

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

151Cs

Maseni broj151
broj neutrona96
relative atomic mass
150,963199 ± 0,000537 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
59 ± 19 ms
spin3/2
nuclear quadrupole moment
datum otkrića1979
parity+

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

152Cs

Maseni broj152
broj neutrona97
relative atomic mass
151,968728 ± 0,000537 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin
nuclear quadrupole moment
datum otkrića1987
parity

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

historija

otkrivač ili izumiteljGustov Kirchoff, Robert Bunsen
mjesto otkrićaGermany
datum otkrića1860
EtimologijaLatin: coesius (sky blue); for the blue lines of its spectrum.
pronunciationSEE-zi-em (engleski)

izvor

Abundance
Abundance in Earth's crust
natural abundance (okean)
0,0003 mg/L
natural abundance (ljudsko tijelo)
0,000002 %
natural abundance (Meteoroidi)
0,000014 %
natural abundance (Sunce)
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