Bari

Bari (Ba)

chemical element with symbol Ba and atomic number 56
Atomic Number56
Atomic Weight137.327
Rhif màs138
Group2
Period6
Blocks
Proton56 p+
Niwtron82 n0
Electron56 e-
Animated Bohr model of Ba (Bari)

Nodwedd Ffisegol

Atomic Radius
215 pm
molar volume
covalent radius
196 pm
Metallic Radius
198 pm
ionic radius
135 pm
Crystal Radius
149 pm
Van der Waals radius
268 pm
density
3.62 g/cm³
Atomic Radii Of The Elements: Bari0102030405060708090100110120130140150160170180190200210220230240250260270pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
0.14462 eV/particle
ionization energy
5.211664 eV/particle
ionization energy of Ba (Bari)
enthalpy of vaporization
142 kJ/mol
enthalpy of fusion
7.66 kJ/mol
standard enthalpy of formation
179.1 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 18, 8, 2
Bohr model: Ba (Bari)
valence electron2
Lewis structure: Ba (Bari)
trefn yr electronnau[Xe] 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2
Enhanced Bohr model of Ba (Bari)
Orbital Diagram of Ba (Bari)
Cyflwr ocsidiad1, 2
Electronegatifedd
0.89
Electrophilicity Index
0.7077543210759566 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
2,118.15 K
Melting Point
1,000.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearance
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
0.0000206 1/K
molar heat capacity
28.07 J/(mol K)
Specific Heat Capacity
0.204 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
2.9 MS/m
Gwrthedd
0.00000035 m Ω
superconductivity
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.0000000113 m³/Kg
magnetic susceptibility (Molar)
0.000000001552 m³/mol
magnetic susceptibility (Volume)
0.00003966
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureBody Centered Cubic (BCC)
lattice constant
5.02 Å
Lattice Anglesπ/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
1.25 MPa
bulk modulus
9.6 GPa
shear modulus
4.9 GPa
Young's modulus
13 GPa
Poisson's ratio
speed of sound
1,620 m/s
classification
CategoryAlkaline earth metals, Alkaline earth metals
CAS GroupIIA
IUPAC GroupIIA
Glawe Number14
Mendeleev Number9
Pettifor Number14
Geochemical Classalkaline earth metal
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
272 ± 10 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
1.3
Neutron Mass Absorption
0.00027
quantum number1S0
space group229 (Im_3m)

Isotopes of Barium

Stable Isotopes5
Unstable Isotopes37
Natural Isotopes7
Isotopic Composition13871.70%13871.70%13711.23%13711.23%1367.85%1367.85%1356.59%1356.59%1342.42%1342.42%1300.11%1300.11%1320.10%1320.10%

113Ba

Rhif màs113
neutron number57
relative atomic mass
112.95737 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
p (proton emission)
α (α emission)

114Ba

Rhif màs114
neutron number58
relative atomic mass
113.950718489 ± 0.000110227 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
460 ± 125 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1995
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)20%
α (α emission)0.9%
12C0.0034%

115Ba

Rhif màs115
neutron number59
relative atomic mass
114.947482 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
450 ± 50 ms
spin5/2
nuclear quadrupole moment
dyddiad darganfod1997
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)15%

116Ba

Rhif màs116
neutron number60
relative atomic mass
115.941621 ± 0.000215 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.3 ± 0.2 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1997
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)3%

117Ba

Rhif màs117
neutron number61
relative atomic mass
116.938316403 ± 0.000268749 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.75 ± 0.07 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1977
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)13%
β+α (β+-delayed α emission)0.024%

118Ba

Rhif màs118
neutron number62
relative atomic mass
117.933226 ± 0.000215 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.2 ± 0.2 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1997
parity+

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

119Ba

Rhif màs119
neutron number63
relative atomic mass
118.930659683 ± 0.000214997 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.4 ± 0.3 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1974
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)25%

120Ba

Rhif màs120
neutron number64
relative atomic mass
119.926044997 ± 0.000322241 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
24 ± 2 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1974
parity+

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

121Ba

Rhif màs121
neutron number65
relative atomic mass
120.924052286 ± 0.000152333 Da
g-factor
0.264 ± 0.0004
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
29.7 ± 1.5 s
spin5/2
nuclear quadrupole moment
1.89 ± 0.13
dyddiad darganfod1975
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.02%

122Ba

Rhif màs122
neutron number66
relative atomic mass
121.919904 ± 0.00003 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.95 ± 0.15 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1974
parity+

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

123Ba

Rhif màs123
neutron number67
relative atomic mass
122.91878106 ± 0.000013 Da
g-factor
-0.272 ± 0.0004
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.7 ± 0.4 m
spin5/2
nuclear quadrupole moment
1.57 ± 0.13
dyddiad darganfod1962
parity+

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

124Ba

Rhif màs124
neutron number68
relative atomic mass
123.915093627 ± 0.000013416 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
11 ± 0.5 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

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

125Ba

Rhif màs125
neutron number69
relative atomic mass
124.91447184 ± 0.0000118 Da
g-factor
0.354 ± 0.024
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.3 ± 0.3 m
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1968
parity+

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

126Ba

Rhif màs126
neutron number70
relative atomic mass
125.911250202 ± 0.000013416 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
100 ± 2 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1954
parity+

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

127Ba

Rhif màs127
neutron number71
relative atomic mass
126.911091272 ± 0.000012192 Da
g-factor
0.1668 ± 0.002
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
12.7 ± 0.4 m
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1952
parity+

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

128Ba

Rhif màs128
neutron number72
relative atomic mass
127.908352446 ± 0.000001728 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.43 ± 0.05 d
spin0
nuclear quadrupole moment
0
dyddiad darganfod1950
parity+

decay modeintensity
ϵ (electron capture)100%

129Ba

Rhif màs129
neutron number73
relative atomic mass
128.908683409 ± 0.000011276 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.23 ± 0.11 h
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1950
parity+

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

130Ba

Rhif màs130
neutron number74
relative atomic mass
129.906326002 ± 0.000000308 Da
g-factor
0
natural abundance
0.11 ± 0.01
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin0
nuclear quadrupole moment
0
dyddiad darganfod1936
parity+

decay modeintensity
+ (double β+ decay)

131Ba

Rhif màs131
neutron number75
relative atomic mass
130.906946315 ± 0.000000445 Da
g-factor
1.4166 ± 0.0004
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
11.52 ± 0.01 d
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1947
parity+

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

132Ba

Rhif màs132
neutron number76
relative atomic mass
131.905061231 ± 0.00000113 Da
g-factor
0
natural abundance
0.1 ± 0.01
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin0
nuclear quadrupole moment
0
dyddiad darganfod1936
parity+

decay modeintensity
+ (double β+ decay)

133Ba

Rhif màs133
neutron number77
relative atomic mass
132.906007443 ± 0.000001065 Da
g-factor
1.5438 ± 0.0004
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
10.5379 ± 0.0016 y
spin1/2
nuclear quadrupole moment
0
dyddiad darganfod1941
parity+

decay modeintensity
ϵ (electron capture)100%

134Ba

Rhif màs134
neutron number78
relative atomic mass
133.904508249 ± 0.000000269 Da
g-factor
0
natural abundance
2.42 ± 0.15
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
dyddiad darganfod1936
parity+

135Ba

Rhif màs135
neutron number79
relative atomic mass
134.905688447 ± 0.000000263 Da
g-factor
0.55873333333333 ± 0.00013333333333333
natural abundance
6.59 ± 0.1
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0.153 ± 0.002
dyddiad darganfod1932
parity+

136Ba

Rhif màs136
neutron number80
relative atomic mass
135.9045758 ± 0.000000262 Da
g-factor
0
natural abundance
7.85 ± 0.24
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
dyddiad darganfod1932
parity+

137Ba

Rhif màs137
neutron number81
relative atomic mass
136.905827207 ± 0.000000266 Da
g-factor
0.625 ± 0.00013333333333333
natural abundance
11.23 ± 0.23
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0.236 ± 0.003
dyddiad darganfod1932
parity+

138Ba

Rhif màs138
neutron number82
relative atomic mass
137.905247059 ± 0.000000267 Da
g-factor
0
natural abundance
71.7 ± 0.29
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
dyddiad darganfod1925
parity+

139Ba

Rhif màs139
neutron number83
relative atomic mass
138.908841164 ± 0.000000271 Da
g-factor
-0.278 ± 0.0014285714285714
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
82.93 ± 0.09 m
spin7/2
nuclear quadrupole moment
-0.552 ± 0.013
dyddiad darganfod1937
parity-

decay modeintensity
β (β decay)100%

140Ba

Rhif màs140
neutron number84
relative atomic mass
139.910608231 ± 0.00000848 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
12.7534 ± 0.0021 d
spin0
nuclear quadrupole moment
0
dyddiad darganfod1939
parity+

decay modeintensity
β (β decay)100%

141Ba

Rhif màs141
neutron number85
relative atomic mass
140.914403653 ± 0.000005709 Da
g-factor
-0.22466666666667 ± 0.0033333333333333
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
18.27 ± 0.07 m
spin3/2
nuclear quadrupole moment
0.437 ± 0.01
dyddiad darganfod1945
parity-

decay modeintensity
β (β decay)100%

142Ba

Rhif màs142
neutron number86
relative atomic mass
141.916432904 ± 0.000006355 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
10.6 ± 0.2 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1959
parity+

decay modeintensity
β (β decay)100%

143Ba

Rhif màs143
neutron number87
relative atomic mass
142.920625149 ± 0.000007253 Da
g-factor
0.1772 ± 0.0044
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
14.5 ± 0.3 s
spin5/2
nuclear quadrupole moment
-0.85 ± 0.02
dyddiad darganfod1962
parity-

decay modeintensity
β (β decay)100%

144Ba

Rhif màs144
neutron number88
relative atomic mass
143.922954821 ± 0.000007661 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
11.73 ± 0.08 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1967
parity+

decay modeintensity
β (β decay)100%

145Ba

Rhif màs145
neutron number89
relative atomic mass
144.9275184 ± 0.0000091 Da
g-factor
-0.114 ± 0.0028
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.31 ± 0.16 s
spin5/2
nuclear quadrupole moment
1.18 ± 0.02
dyddiad darganfod1974
parity-

decay modeintensity
β (β decay)100%

146Ba

Rhif màs146
neutron number90
relative atomic mass
145.9303632 ± 0.0000019 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.15 ± 0.04 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod1970
parity+

decay modeintensity
β (β decay)100%

147Ba

Rhif màs147
neutron number91
relative atomic mass
146.9353039 ± 0.0000212 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
893 ± 1 ms
spin5/2
nuclear quadrupole moment
dyddiad darganfod1978
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.07%

148Ba

Rhif màs148
neutron number92
relative atomic mass
147.938223 ± 0.0000016 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
620 ± 5 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1979
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.4%

149Ba

Rhif màs149
neutron number93
relative atomic mass
148.943284 ± 0.0000027 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
349 ± 4 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1993
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)3.9%

150Ba

Rhif màs150
neutron number94
relative atomic mass
149.9464411 ± 0.0000061 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
258 ± 5 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1994
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)1%

151Ba

Rhif màs151
neutron number95
relative atomic mass
150.951755 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
167 ± 5 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1994
parity-

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

152Ba

Rhif màs152
neutron number96
relative atomic mass
151.95533 ± 0.000429 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
139 ± 8 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod2010
parity+

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

153Ba

Rhif màs153
neutron number97
relative atomic mass
152.960848 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
113 ± 39 ms
spin5/2
nuclear quadrupole moment
dyddiad darganfod2016
parity-

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

154Ba

Rhif màs154
neutron number98
relative atomic mass
153.964659 ± 0.000537 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
53 ± 48 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod2017
parity+

decay modeintensity
β (β decay)100%
Barium 1

hanes

darganfyddwr neu ddyfeisiwrSir Humphrey Davy
man darganfodEngland
dyddiad darganfod1808
geirdarddiadGreek: barys (heavy or dense).
ynganiadBAR-i-em (Saesneg)

source

Abundance
Abundance in Earth's crust
425 mg/kg
natural abundance (cefnfor)
0.013 mg/L
natural abundance (corff dynol)
0.00003 %
natural abundance (Awyrfaen)
0.00027 %
natural abundance (Haul)
0.000001 %
Abundance in Universe
0.000001 %

Nuclear Screening Constants

1s1.1139
2p4.1904
2s14.7532
3d13.9757
3p18.6836
3s18.8444
4d32.216
4p29.1968
4s28.08
5p41.1995
5s39.3805
6s48.425