Rubidi

Rubidi (Rb)

chemical element with symbol Rb and atomic number 37
Atomic Number37
Atomic Weight85.4678
Rhif màs85
Group1
Period5
Blocks
Proton37 p+
Niwtron48 n0
Electron37 e-
Animated Bohr model of Rb (Rubidi)

Nodwedd Ffisegol

Atomic Radius
235 pm
molar volume
covalent radius
210 pm
Metallic Radius
216 pm
ionic radius
152 pm
Crystal Radius
166 pm
Van der Waals radius
303 pm
density
1.53 g/cm³
Atomic Radii Of The Elements: Rubidi0102030405060708090100110120130140150160170180190200210220230240250260270280290300310pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
0.48592 eV/particle
ionization energy
4.177128 eV/particle
ionization energy of Rb (Rubidi)
enthalpy of vaporization
75.8 kJ/mol
enthalpy of fusion
2.2 kJ/mol
standard enthalpy of formation
80.9 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 8, 1
Bohr model: Rb (Rubidi)
valence electron1
Lewis structure: Rb (Rubidi)
trefn yr electronnau[Kr] 5s1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
Enhanced Bohr model of Rb (Rubidi)
Orbital Diagram of Rb (Rubidi)
Cyflwr ocsidiad-1, 1
Electronegatifedd
0.82
Electrophilicity Index
0.7363448717297969 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
961.15 K
Melting Point
312.45 K
critical pressure
16 MPa
critical temperature
2,093.15 K
triple point
312.41 K
appearance
lliw
Silver
appearancegrey white
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
58.2 W/(m K)
thermal expansion
molar heat capacity
31.06 J/(mol K)
Specific Heat Capacity
0.363 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
8.3 MS/m
Gwrthedd
0.00000012 m Ω
superconductivity
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.0000000026 m³/Kg
magnetic susceptibility (Molar)
0.000000000222 m³/mol
magnetic susceptibility (Volume)
0.00000398
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureBody Centered Cubic (BCC)
lattice constant
5.59 Å
Lattice Anglesπ/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
0.3 MPa
bulk modulus
2.5 GPa
shear modulus
Young's modulus
2.4 GPa
Poisson's ratio
speed of sound
1,300 m/s
classification
CategoryAlkali metals, Alkali metals
CAS GroupIA
IUPAC GroupIA
Glawe Number9
Mendeleev Number4
Pettifor Number9
Geochemical Classalkali metal
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
319.8 ± 0.3 a₀
C6 Dispersion Coefficient
4,769 a₀
allotrope
Neutron cross section
0.38
Neutron Mass Absorption
0.0003
quantum number2S1/2
space group229 (Im_3m)

Isotopes of Rubidium

Stable Isotopes1
Unstable Isotopes33
Natural Isotopes2
Isotopic Composition8572.17%8572.17%8727.83%8727.83%

71Rb

Rhif màs71
neutron number34
relative atomic mass
70.965335 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod
parity-

decay modeintensity
p (proton emission)

72Rb

Rhif màs72
neutron number35
relative atomic mass
71.958851 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
103 ± 22 ns
spin1
nuclear quadrupole moment
dyddiad darganfod2017
parity+

decay modeintensity
p (proton emission)

73Rb

Rhif màs73
neutron number36
relative atomic mass
72.950604506 ± 0.000043794 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod1996
parity-

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

74Rb

Rhif màs74
neutron number37
relative atomic mass
73.944265867 ± 0.000003249 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
64.78 ± 0.03 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1977
parity+

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

75Rb

Rhif màs75
neutron number38
relative atomic mass
74.9385732 ± 0.000001266 Da
g-factor
0.386 ± 0.00066666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
19 ± 1.2 s
spin3/2
nuclear quadrupole moment
0.81 ± 0.04
dyddiad darganfod1975
parity-

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

76Rb

Rhif màs76
neutron number39
relative atomic mass
75.935073031 ± 0.000001006 Da
g-factor
-0.372552 ± 0.000011
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
36.5 ± 0.6 s
spin1
nuclear quadrupole moment
0.41 ± 0.09
dyddiad darganfod1969
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+α (β+-delayed α emission)3.8%

77Rb

Rhif màs77
neutron number40
relative atomic mass
76.930401599 ± 0.0000014 Da
g-factor
0.43622666666667 ± 0.000013333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.78 ± 0.04 m
spin3/2
nuclear quadrupole moment
0.84 ± 0.17
dyddiad darganfod1972
parity-

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

78Rb

Rhif màs78
neutron number41
relative atomic mass
77.928141866 ± 0.000003475 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.66 ± 0.03 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1968
parity+

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

79Rb

Rhif màs79
neutron number42
relative atomic mass
78.923990095 ± 0.000002085 Da
g-factor
1.34292 ± 0.00048
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
22.9 ± 0.5 m
spin5/2
nuclear quadrupole moment
-0.12 ± 0.04
dyddiad darganfod1957
parity+

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

80Rb

Rhif màs80
neutron number43
relative atomic mass
79.922516442 ± 0.000002 Da
g-factor
-0.0833 ± 0.0007
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
33.4 ± 0.7 s
spin1
nuclear quadrupole moment
0.42 ± 0.08
dyddiad darganfod1961
parity+

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

81Rb

Rhif màs81
neutron number44
relative atomic mass
80.9189939 ± 0.000005265 Da
g-factor
1.3727333333333 ± 0.00093333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.572 ± 0.004 h
spin3/2
nuclear quadrupole moment
0.48 ± 0.1
dyddiad darganfod1949
parity-

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

82Rb

Rhif màs82
neutron number45
relative atomic mass
81.918209023 ± 0.00000323 Da
g-factor
0.554403 ± 0.000016
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.2575 ± 0.0002 m
spin1
nuclear quadrupole moment
0.23 ± 0.1
dyddiad darganfod1949
parity+

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

83Rb

Rhif màs83
neutron number46
relative atomic mass
82.915114181 ± 0.0000025 Da
g-factor
0.56984 ± 0.00032
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
86.2 ± 0.1 d
spin5/2
nuclear quadrupole moment
0.24 ± 0.05
dyddiad darganfod1950
parity-

decay modeintensity
ϵ (electron capture)100%

84Rb

Rhif màs84
neutron number47
relative atomic mass
83.914375223 ± 0.000002355 Da
g-factor
-0.6625 ± 0.001
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
32.82 ± 0.07 d
spin2
nuclear quadrupole moment
-0.02 ± 0.04
dyddiad darganfod1947
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)96.1%
β (β decay)3.9%

85Rb

Rhif màs85
neutron number48
relative atomic mass
84.91178973604 ± 0.00000000537 Da
g-factor
0.541224 ± 0.000016
natural abundance
72.17 ± 0.02
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin5/2
nuclear quadrupole moment
0.276 ± 0.001
dyddiad darganfod1921
parity-

86Rb

Rhif màs86
neutron number49
relative atomic mass
85.911167443 ± 0.000000214 Da
g-factor
-0.8487 ± 0.0008
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
18.645 ± 0.008 d
spin2
nuclear quadrupole moment
0.23 ± 0.06
dyddiad darganfod1941
parity-

decay modeintensity
β (β decay)100%
ϵ (electron capture)0.0052%

87Rb

Rhif màs87
neutron number50
relative atomic mass
86.909180529 ± 0.000000006 Da
g-factor
1.8341933333333 ± 0.000053333333333333
natural abundance
27.83 ± 0.02
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
49.7 ± 0.3 Gy
spin3/2
nuclear quadrupole moment
0.1335 ± 0.0005
dyddiad darganfod1921
parity-

decay modeintensity
β (β decay)100%

88Rb

Rhif màs88
neutron number51
relative atomic mass
87.91131559 ± 0.00000017 Da
g-factor
0.253755 ± 0.00001
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.78 ± 0.03 m
spin2
nuclear quadrupole moment
-0.01 ± 0.11
dyddiad darganfod1939
parity-

decay modeintensity
β (β decay)100%

89Rb

Rhif màs89
neutron number52
relative atomic mass
88.912278136 ± 0.000005825 Da
g-factor
1.5887333333333 ± 0.00046666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
15.32 ± 0.1 m
spin3/2
nuclear quadrupole moment
0.17 ± 0.03
dyddiad darganfod1940
parity-

decay modeintensity
β (β decay)100%

90Rb

Rhif màs90
neutron number53
relative atomic mass
89.914797557 ± 0.000006926 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
158 ± 5 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1951
parity-

decay modeintensity
β (β decay)100%

91Rb

Rhif màs91
neutron number54
relative atomic mass
90.916537261 ± 0.000008375 Da
g-factor
1.4540666666667 ± 0.001
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
58.2 ± 0.3 s
spin3/2
nuclear quadrupole moment
0.19 ± 0.05
dyddiad darganfod1951
parity-

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

92Rb

Rhif màs92
neutron number55
relative atomic mass
91.919728477 ± 0.000006573 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.48 ± 0.03 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1960
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.0107%

93Rb

Rhif màs93
neutron number56
relative atomic mass
92.922039334 ± 0.000008406 Da
g-factor
0.56368 ± 0.00064
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.84 ± 0.02 s
spin5/2
nuclear quadrupole moment
0.21 ± 0.06
dyddiad darganfod1960
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)1.39%

94Rb

Rhif màs94
neutron number57
relative atomic mass
93.926394819 ± 0.000002177 Da
g-factor
0.49936666666667 ± 0.0006
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.702 ± 0.005 s
spin3
nuclear quadrupole moment
0.2 ± 0.07
dyddiad darganfod1961
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)10.3%

95Rb

Rhif màs95
neutron number58
relative atomic mass
94.929263849 ± 0.000021733 Da
g-factor
0.5332 ± 0.0012
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
377.7 ± 0.8 ms
spin5/2
nuclear quadrupole moment
0.26 ± 0.09
dyddiad darganfod1967
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)8.7%

96Rb

Rhif màs96
neutron number59
relative atomic mass
95.934133398 ± 0.000003599 Da
g-factor
0.73275 ± 0.00085
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
201.5 ± 0.9 ms
spin2
nuclear quadrupole moment
0.3 ± 0.09
dyddiad darganfod1967
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)13.7%
2n (2-neutron emission)

97Rb

Rhif màs97
neutron number60
relative atomic mass
96.937177117 ± 0.000002052 Da
g-factor
1.2266666666667 ± 0.0013333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
169.1 ± 0.6 ms
spin3/2
nuclear quadrupole moment
0.7
dyddiad darganfod1969
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)25.5%
2n (2-neutron emission)

98Rb

Rhif màs98
neutron number61
relative atomic mass
97.941632317 ± 0.000017265 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
115 ± 6 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1971
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)14.3%
2n (2-neutron emission)0.054%

99Rb

Rhif màs99
neutron number62
relative atomic mass
98.94511919 ± 0.000004327 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
54 ± 4 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1971
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)17.3%
2n (2-neutron emission)

100Rb

Rhif màs100
neutron number63
relative atomic mass
99.950331532 ± 0.000014089 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
51.3 ± 1.6 ms
spin4
nuclear quadrupole moment
dyddiad darganfod1978
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)5.6%
2n (2-neutron emission)0.15%

101Rb

Rhif màs101
neutron number64
relative atomic mass
100.954302 ± 0.000022 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
31.8 ± 3.3 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1992
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)28%
2n (2-neutron emission)

102Rb

Rhif màs102
neutron number65
relative atomic mass
101.960008 ± 0.000089 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
37 ± 4 ms
spin4
nuclear quadrupole moment
dyddiad darganfod1995
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)65%
2n (2-neutron emission)

103Rb

Rhif màs103
neutron number66
relative atomic mass
102.964401 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
26 ± 11 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod2010
parity+

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

104Rb

Rhif màs104
neutron number67
relative atomic mass
103.970531 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod2018
parity

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
RbMetal.JPG

hanes

darganfyddwr neu ddyfeisiwrR. Bunsen, G. Kirchoff
man darganfodGermany
dyddiad darganfod1861
geirdarddiadLatin: rubidus (deep red); the color its salts impart to flames.
ynganiadroo-BID-i-em (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
0.12 mg/L
natural abundance (corff dynol)
0.00046 %
natural abundance (Awyrfaen)
0.00032 %
natural abundance (Haul)
0.000003 %
Abundance in Universe
0.000001 %

Nuclear Screening Constants

1s0.7922
2p3.9612
2s9.8432
3d15.3208
3p15.6967
3s15.1573
4p26.1192
4s24.612
5s32.0155