Cesium

Cesium (Cs)

grundämne
Atomnummer55
Atommassa132.90545196
masstal133
Grupp1
Period6
Blocks
Protoner55 p+
Neutroner78 n0
Electrons55 e-
Animated Bohrs atommodell of Cs (Cesium)

Egenskaper

fysisk egenskap
atomradie
260 pm
molvolym
kovalent radie
232 pm
Metallic Radius
235 pm
ionic radius
167 pm
Crystal Radius
181 pm
Van der Waalsradie
343 pm
densitet
1,873 g/cm³
energi
proton affinity
Elektronaffinitet
0,471626 eV/particle
joniseringsenergi
3,893905548 eV/particle
joniseringsenergi of Cs (Cesium)
ångbildningsvärme
68,3 kJ/mol
smältvärme
2,09 kJ/mol
Bildningsentalpi
76,5 kJ/mol
Electrons
electron shell2, 8, 18, 18, 8, 1
Bohrs atommodell: Cs (Cesium)
valenselektron1
Elektronformel: Cs (Cesium)
elektronkonfiguration[Xe] 6s1
Enhanced Bohrs atommodell of Cs (Cesium)
Orbital Diagram of Cs (Cesium)
oxidationstal-1, 1
elektronegativitet
0.79
Electrophilicity
0,696095447101947 eV/particle
Phases
aggregationstillståndFast
Gas Phase
Kokpunkt
944,15 K
Smältpunkt
301,65 K
critical pressure
9,4 MPa
critical temperature
1 938,15 K
trippelpunkt
Visual
färg
Silver
appearancesilvery gold
Brytningsindex
materialegenskap
Värmeledningsförmåga
35,9 W/(m K)
termisk expansion
molar heat capacity
32,21 J/(mol K)
Specifik värmekapacitet
0,242 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
elektrisk konduktivitet
5 MS/m
resistivitet
0,0000002 m Ω
supraledare
magnetism
typeparamagnetic
magnetisk susceptibilitet (Mass)
0,0000000028 m³/Kg
magnetisk susceptibilitet (Molar)
0,000000000372 m³/mol
magnetisk susceptibilitet (Volume)
0,00000526
magnetic ordering
Curiepunkten
Néel temperature
Structure
KristallstrukturRymdcentrerat kubisk (BCC)
Gitterkonstant
6,05 Å
Lattice Anglesπ/2, π/2, π/2
mekanisk materialegenskap
hårdhet
0,2 MPa
Kompressibilitet
1,6 GPa
skjuvmodul
Young's modulus
1,7 GPa
Poissons konstant
ljudhastighet
klassificering
KategoriAlkalimetaller, Alkali metals
CAS GroupIA
IUPAC GroupIA
Glawe Number8
Mendeleev Number5
Pettifor Number8
Geochemical Classalkali metal
Goldschmidt classificationlitophile
övrigt
Gas Basicity
Dipole Polarizability
400,9 ± 0,7 a₀
C6 Dispersion Coefficient
Allotropes
Träffyta
29
Neutron Mass Absorption
0,0077
kvanttal2S1/2
rymdgrupp229 (Im_3m)

Cesiumisotoper

Stabila isotoper1
Instabila isotoper41
Radioactive Isotopes41

111Cs

natural abundanceRadioactive ☢️
relative atomic mass
110,953945 ± 0,000215 Da
masstal111
g-factor
Halveringstid
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum
Paritet+

111Cs Decay Modes
decay modeIntensitet
p (proton emission)%

112Cs

natural abundanceRadioactive ☢️
relative atomic mass
111,950172 ± 0,000124 Da
masstal112
g-factor
Halveringstid
490 ± 30 us
Spinn1
nuclear quadrupole moment
upptäcktsdatum1994
Paritet+

112Cs Decay Modes
decay modeIntensitet
p (proton emission)100%
α (α emission)0.26%

113Cs

natural abundanceRadioactive ☢️
relative atomic mass
112,944428484 ± 0,000009207 Da
masstal113
g-factor
Halveringstid
16,94 ± 0,09 us
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1984
Paritet+

113Cs Decay Modes
decay modeIntensitet
p (proton emission)100%

114Cs

natural abundanceRadioactive ☢️
relative atomic mass
113,941292244 ± 0,000091323 Da
masstal114
g-factor
Halveringstid
570 ± 20 ms
Spinn1
nuclear quadrupole moment
upptäcktsdatum1978
Paritet+

114Cs Decay Modes
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

natural abundanceRadioactive ☢️
relative atomic mass
114,93591 ± 0,00011 Da
masstal115
g-factor
Halveringstid
1,4 ± 0,8 s
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum1978
Paritet+

115Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.07%

116Cs

natural abundanceRadioactive ☢️
relative atomic mass
115,933395 ± 0,000108 Da
masstal116
g-factor
Halveringstid
700 ± 40 ms
Spinn1
nuclear quadrupole moment
upptäcktsdatum1975
Paritet+

116Cs Decay Modes
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

natural abundanceRadioactive ☢️
relative atomic mass
116,928616723 ± 0,000067 Da
masstal117
g-factor
Halveringstid
8,4 ± 0,6 s
Spinn9/2
nuclear quadrupole moment
upptäcktsdatum1972
Paritet+

117Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

118Cs

natural abundanceRadioactive ☢️
relative atomic mass
117,926559517 ± 0,00001369 Da
masstal118
g-factor
1,935 ± 0,0025
Halveringstid
14 ± 2 s
Spinn2
nuclear quadrupole moment
1,31 ± 0,17
upptäcktsdatum1969
Paritet+

118Cs Decay Modes
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

natural abundanceRadioactive ☢️
relative atomic mass
118,922377327 ± 0,000014965 Da
masstal119
g-factor
1,2111111111111 ± 0,0066666666666667
Halveringstid
43 ± 0,2 s
Spinn9/2
nuclear quadrupole moment
2,65 ± 0,17
upptäcktsdatum1969
Paritet+

119Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+α (β+-delayed α emission)2%

120Cs

natural abundanceRadioactive ☢️
relative atomic mass
119,920677277 ± 0,000010702 Da
masstal120
g-factor
1,93 ± 0,01
Halveringstid
60,4 ± 0,6 s
Spinn2
nuclear quadrupole moment
1,36 ± 0,07
upptäcktsdatum1969
Paritet+

120Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+α (β+-delayed α emission)2%
β+ p (β+-delayed proton emission)7%

121Cs

natural abundanceRadioactive ☢️
relative atomic mass
120,917227235 ± 0,00001534 Da
masstal121
g-factor
0,51266666666667 ± 0,0026666666666667
Halveringstid
155 ± 4 s
Spinn3/2
nuclear quadrupole moment
0,79 ± 0,04
upptäcktsdatum1969
Paritet+

121Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

122Cs

natural abundanceRadioactive ☢️
relative atomic mass
121,916108144 ± 0,000036164 Da
masstal122
g-factor
0,133 ± 0,002
Halveringstid
21,18 ± 0,19 s
Spinn1
nuclear quadrupole moment
−0,179 ± 0,01
upptäcktsdatum1969
Paritet+

122Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+α (β+-delayed α emission)2%

123Cs

natural abundanceRadioactive ☢️
relative atomic mass
122,91299606 ± 0,000013 Da
masstal123
g-factor
2,75 ± 0,014
Halveringstid
5,88 ± 0,03 m
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1954
Paritet+

123Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

124Cs

natural abundanceRadioactive ☢️
relative atomic mass
123,912247366 ± 0,000009823 Da
masstal124
g-factor
0,672 ± 0,003
Halveringstid
30,9 ± 0,4 s
Spinn1
nuclear quadrupole moment
−0,69 ± 0,04
upptäcktsdatum1969
Paritet+

124Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

125Cs

natural abundanceRadioactive ☢️
relative atomic mass
124,909725953 ± 0,000008304 Da
masstal125
g-factor
2,814 ± 0,014
Halveringstid
44,35 ± 0,29 m
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1954
Paritet+

125Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

126Cs

natural abundanceRadioactive ☢️
relative atomic mass
125,909445821 ± 0,00001112 Da
masstal126
g-factor
0,776 ± 0,004
Halveringstid
1,64 ± 0,02 m
Spinn1
nuclear quadrupole moment
−0,64 ± 0,03
upptäcktsdatum1954
Paritet+

126Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

127Cs

natural abundanceRadioactive ☢️
relative atomic mass
126,907417527 ± 0,000005987 Da
masstal127
g-factor
2,914 ± 0,014
Halveringstid
6,25 ± 0,1 h
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1950
Paritet+

127Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

128Cs

natural abundanceRadioactive ☢️
relative atomic mass
127,907748452 ± 0,000005771 Da
masstal128
g-factor
0,972 ± 0,005
Halveringstid
3,64 ± 0,014 m
Spinn1
nuclear quadrupole moment
−0,54 ± 0,03
upptäcktsdatum1951
Paritet+

128Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

129Cs

natural abundanceRadioactive ☢️
relative atomic mass
128,90606591 ± 0,000004888 Da
masstal129
g-factor
2,978 ± 0,016
Halveringstid
32,06 ± 0,06 h
Spinn1/2
nuclear quadrupole moment
0
upptäcktsdatum1950
Paritet+

129Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

130Cs

natural abundanceRadioactive ☢️
relative atomic mass
129,906709281 ± 0,000008971 Da
masstal130
g-factor
1,458 ± 0,007
Halveringstid
29,21 ± 0,04 m
Spinn1
nuclear quadrupole moment
−0,056 ± 0,006
upptäcktsdatum1952
Paritet+

130Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)98.4%
β (β decay)1.6%

131Cs

natural abundanceRadioactive ☢️
relative atomic mass
130,905468457 ± 0,00000019 Da
masstal131
g-factor
1,4144 ± 0,0012
Halveringstid
9,689 ± 0,016 d
Spinn5/2
nuclear quadrupole moment
0,59 ± 0,02
upptäcktsdatum1947
Paritet+

131Cs Decay Modes
decay modeIntensitet
ϵ (electron capture)100%

132Cs

natural abundanceRadioactive ☢️
relative atomic mass
131,90643774 ± 0,000001112 Da
masstal132
g-factor
1,1095 ± 0,0035
Halveringstid
6,48 ± 0,006 d
Spinn2
nuclear quadrupole moment
0,48 ± 0,02
upptäcktsdatum1953
Paritet+

132Cs Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)98.13%
β (β decay)1.87%

133Cs

natural abundance
100
relative atomic mass
132,905451958 ± 0,000000008 Da
masstal133
g-factor
0,73651428571429 ± 0,0004
Halveringstid
Spinn7/2
nuclear quadrupole moment
−0,00343 ± 0,0001
upptäcktsdatum1921
Paritet+

134Cs

natural abundanceRadioactive ☢️
relative atomic mass
133,906718501 ± 0,000000017 Da
masstal134
g-factor
0,747325 ± 0,00035
Halveringstid
2,065 ± 0,0004 y
Spinn4
nuclear quadrupole moment
0,37 ± 0,02
upptäcktsdatum1940
Paritet+

134Cs Decay Modes
decay modeIntensitet
β (β decay)100%
ϵ (electron capture)0.0003%

135Cs

natural abundanceRadioactive ☢️
relative atomic mass
134,905976907 ± 0,00000039 Da
masstal135
g-factor
0,77951428571429 ± 0,00037142857142857
Halveringstid
1,33 ± 0,19 My
Spinn7/2
nuclear quadrupole moment
0,048 ± 0,003
upptäcktsdatum1949
Paritet+

135Cs Decay Modes
decay modeIntensitet
β (β decay)100%

136Cs

natural abundanceRadioactive ☢️
relative atomic mass
135,907311431 ± 0,00000201 Da
masstal136
g-factor
0,741 ± 0,003
Halveringstid
13,01 ± 0,05 d
Spinn5
nuclear quadrupole moment
0,213 ± 0,015
upptäcktsdatum1951
Paritet+

136Cs Decay Modes
decay modeIntensitet
β (β decay)100%

137Cs

natural abundanceRadioactive ☢️
relative atomic mass
136,907089296 ± 0,000000324 Da
masstal137
g-factor
0,81068571428571 ± 0,0004
Halveringstid
30,04 ± 0,04 y
Spinn7/2
nuclear quadrupole moment
0,048 ± 0,002
upptäcktsdatum1951
Paritet+

137Cs Decay Modes
decay modeIntensitet
β (β decay)100%

138Cs

natural abundanceRadioactive ☢️
relative atomic mass
137,911017119 ± 0,000009831 Da
masstal138
g-factor
0,233 ± 0,0013333333333333
Halveringstid
33,5 ± 0,2 m
Spinn3
nuclear quadrupole moment
0,112 ± 0,017
upptäcktsdatum1943
Paritet-

138Cs Decay Modes
decay modeIntensitet
β (β decay)100%

139Cs

natural abundanceRadioactive ☢️
relative atomic mass
138,913363822 ± 0,000003364 Da
masstal139
g-factor
0,768 ± 0,0011428571428571
Halveringstid
9,27 ± 0,05 m
Spinn7/2
nuclear quadrupole moment
−0,063 ± 0,014
upptäcktsdatum1939
Paritet+

139Cs Decay Modes
decay modeIntensitet
β (β decay)100%

140Cs

natural abundanceRadioactive ☢️
relative atomic mass
139,917283707 ± 0,000008801 Da
masstal140
g-factor
0,134 ± 0,001
Halveringstid
63,7 ± 0,3 s
Spinn1
nuclear quadrupole moment
−0,094 ± 0,015
upptäcktsdatum1950
Paritet-

140Cs Decay Modes
decay modeIntensitet
β (β decay)100%

141Cs

natural abundanceRadioactive ☢️
relative atomic mass
140,920045279 ± 0,000009871 Da
masstal141
g-factor
0,69457142857143 ± 0,0028571428571429
Halveringstid
24,84 ± 0,16 s
Spinn7/2
nuclear quadrupole moment
−0,42 ± 0,07
upptäcktsdatum1962
Paritet+

141Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)0.0342%

142Cs

natural abundanceRadioactive ☢️
relative atomic mass
141,924299514 ± 0,000007586 Da
masstal142
g-factor
0
Halveringstid
1,687 ± 0,01 s
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1962
Paritet-

142Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)0.089%

143Cs

natural abundanceRadioactive ☢️
relative atomic mass
142,927347346 ± 0,00000813 Da
masstal143
g-factor
0,57933333333333 ± 0,0026666666666667
Halveringstid
1,802 ± 0,008 s
Spinn3/2
nuclear quadrupole moment
0,44 ± 0,03
upptäcktsdatum1962
Paritet+

143Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)1.62%

144Cs

natural abundanceRadioactive ☢️
relative atomic mass
143,932075402 ± 0,000021612 Da
masstal144
g-factor
−0,545 ± 0,003
Halveringstid
994 ± 6 ms
Spinn1
nuclear quadrupole moment
0,29 ± 0,02
upptäcktsdatum1967
Paritet-

144Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)2.98%

145Cs

natural abundanceRadioactive ☢️
relative atomic mass
144,935528927 ± 0,000009733 Da
masstal145
g-factor
0,522 ± 0,0026666666666667
Halveringstid
582 ± 4 ms
Spinn3/2
nuclear quadrupole moment
0,58 ± 0,06
upptäcktsdatum1971
Paritet+

145Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)12.8%

146Cs

natural abundanceRadioactive ☢️
relative atomic mass
145,940621867 ± 0,000003106 Da
masstal146
g-factor
−0,514 ± 0,002
Halveringstid
321,6 ± 0,9 ms
Spinn1
nuclear quadrupole moment
0,21 ± 0,03
upptäcktsdatum1971
Paritet-

146Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)14.2%
2n (2-neutron emission)%

147Cs

natural abundanceRadioactive ☢️
relative atomic mass
146,944261512 ± 0,000009 Da
masstal147
g-factor
Halveringstid
230,5 ± 0,9 ms
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1978
Paritet+

147Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)28.5%

148Cs

natural abundanceRadioactive ☢️
relative atomic mass
147,949639026 ± 0,000014 Da
masstal148
g-factor
Halveringstid
151,8 ± 1 ms
Spinn2
nuclear quadrupole moment
upptäcktsdatum1978
Paritet-

148Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)28.7%
2n (2-neutron emission)%

149Cs

natural abundanceRadioactive ☢️
relative atomic mass
148,953516 ± 0,000429 Da
masstal149
g-factor
Halveringstid
112,3 ± 2,5 ms
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1979
Paritet+

149Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)25%
2n (2-neutron emission)%

150Cs

natural abundanceRadioactive ☢️
relative atomic mass
149,959023 ± 0,000429 Da
masstal150
g-factor
Halveringstid
81 ± 2,6 ms
Spinn2
nuclear quadrupole moment
upptäcktsdatum1979
Paritet-

150Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)44%
2n (2-neutron emission)%

151Cs

natural abundanceRadioactive ☢️
relative atomic mass
150,963199 ± 0,000537 Da
masstal151
g-factor
Halveringstid
59 ± 19 ms
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1979
Paritet+

151Cs Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%
2n (2-neutron emission)%

152Cs

natural abundanceRadioactive ☢️
relative atomic mass
151,968728 ± 0,000537 Da
masstal152
g-factor
Halveringstid
Spinn
nuclear quadrupole moment
upptäcktsdatum1987
Paritet

152Cs Decay Modes
decay modeIntensitet
β (β decay)%
β n (β-delayed neutron emission)%
Cesium

historia

upptäckare eller uppfinnareGustov Kirchoff, Robert Bunsen
fyndplatsGermany
upptäcktsdatum1860
etymologiLatin: coesius (sky blue); for the blue lines of its spectrum.
uttalSEE-zi-em (engelska)

Sources

Förekomst
Abundance in Earth's crust
Abundance in Oceans
0,0003 mg/L
Abundance in Human Body
0,000002 %
Abundance in Meteor
0,000014 %
Abundance in Sun
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