Barium

Barium (Ba)

chemical element with symbol Ba and atomic number 56
Atomic Number56
Atomic Weight137.327
Massagetal138
Group2
Period6
Blocks
proton56 p+
neutron82 n0
elektron56 e-
Animated Bohr model of Ba (Barium)

Physical Property

Atoomradius
215 pm
molar volume
Covalent Radius
196 pm
Metallic Radius
198 pm
Ioonradius
135 pm
Crystal Radius
149 pm
Van der Waals radius
268 pm
density
3,62 g/cm³
Atomic Radii Of The Elements: Barium0306090120150180210240270pmAtoomradiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energie
proton affinity
electron affinity
0,14462 eV/particle
ionization energy
5,211664 eV/particle
ionization energy of Ba (Barium)
Verdampingswarmte
142 kJ/mol
smeltingswarmte
7,66 kJ/mol
Vormingsentalpie
179,1 kJ/mol
elektron
Elektronskil2, 8, 18, 18, 8, 2
Bohr model: Ba (Barium)
Valenselektrone2
Lewisteorie: Ba (Barium)
elektronkonfigurasie[Xe] 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2
Enhanced Bohr model of Ba (Barium)
Orbital Diagram of Ba (Barium)
Oksidasietoestand1, 2
Elektronegatiwiteit
0.89
Electrophilicity Index
0,7077543210759566 eV/particle
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
2 118,15 K
Melting Point
1 000,15 K
critical pressure
critical temperature
triple point
appearance
kleur
Silver
appearance
Brekingsindeks
thermodynamic material property
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
Geleidingsvermoë
2,9 MS/m
Elektriese resistiwiteit
0,00000035 m Ω
superconductivity
Magnetisme
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
structure
Crystal StructureBody Centered Cubic (BCC)
lattice constant
5,02 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
1,25 MPa
Massamodulus
9,6 GPa
Skuifmodulus
4,9 GPa
Young se modulus
13 GPa
Poisson se verhouding
Spoed van klank
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
Ruimtegroep229 (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

Massagetal113
neutron number57
relative atomic mass
112,95737 ± 0,000322 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin5/2
nuclear quadrupole moment
ontdekkingsdatum
parity+

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

114Ba

Massagetal114
neutron number58
relative atomic mass
113,950718489 ± 0,000110227 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
460 ± 125 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1995
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

Massagetal115
neutron number59
relative atomic mass
114,947482 ± 0,000215 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
450 ± 50 ms
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1997
parity+

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

116Ba

Massagetal116
neutron number60
relative atomic mass
115,941621 ± 0,000215 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,3 ± 0,2 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1997
parity+

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

117Ba

Massagetal117
neutron number61
relative atomic mass
116,938316403 ± 0,000268749 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,75 ± 0,07 s
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1977
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

Massagetal118
neutron number62
relative atomic mass
117,933226 ± 0,000215 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5,2 ± 0,2 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1997
parity+

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

119Ba

Massagetal119
neutron number63
relative atomic mass
118,930659683 ± 0,000214997 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5,4 ± 0,3 s
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1974
parity+

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

120Ba

Massagetal120
neutron number64
relative atomic mass
119,926044997 ± 0,000322241 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
24 ± 2 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1974
parity+

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

121Ba

Massagetal121
neutron number65
relative atomic mass
120,924052286 ± 0,000152333 Da
g-factor
0,264 ± 0,0004
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
29,7 ± 1,5 s
spin5/2
nuclear quadrupole moment
1,89 ± 0,13
ontdekkingsdatum1975
parity+

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

122Ba

Massagetal122
neutron number66
relative atomic mass
121,919904 ± 0,00003 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
1,95 ± 0,15 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1974
parity+

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

123Ba

Massagetal123
neutron number67
relative atomic mass
122,91878106 ± 0,000013 Da
g-factor
-0,272 ± 0,0004
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,7 ± 0,4 m
spin5/2
nuclear quadrupole moment
1,57 ± 0,13
ontdekkingsdatum1962
parity+

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

124Ba

Massagetal124
neutron number68
relative atomic mass
123,915093627 ± 0,000013416 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11 ± 0,5 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

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

125Ba

Massagetal125
neutron number69
relative atomic mass
124,91447184 ± 0,0000118 Da
g-factor
0,354 ± 0,024
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
3,3 ± 0,3 m
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1968
parity+

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

126Ba

Massagetal126
neutron number70
relative atomic mass
125,911250202 ± 0,000013416 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
100 ± 2 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1954
parity+

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

127Ba

Massagetal127
neutron number71
relative atomic mass
126,911091272 ± 0,000012192 Da
g-factor
0,1668 ± 0,002
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
12,7 ± 0,4 m
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1952
parity+

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

128Ba

Massagetal128
neutron number72
relative atomic mass
127,908352446 ± 0,000001728 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,43 ± 0,05 d
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1950
parity+

decay modeintensity
ϵ (electron capture)100%

129Ba

Massagetal129
neutron number73
relative atomic mass
128,908683409 ± 0,000011276 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,23 ± 0,11 h
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1950
parity+

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

130Ba

Massagetal130
neutron number74
relative atomic mass
129,906326002 ± 0,000000308 Da
g-factor
0
natural abundance
0,11 ± 0,01
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1936
parity+

decay modeintensity
+ (double β+ decay)

131Ba

Massagetal131
neutron number75
relative atomic mass
130,906946315 ± 0,000000445 Da
g-factor
1,4166 ± 0,0004
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11,52 ± 0,01 d
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1947
parity+

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

132Ba

Massagetal132
neutron number76
relative atomic mass
131,905061231 ± 0,00000113 Da
g-factor
0
natural abundance
0,1 ± 0,01
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1936
parity+

decay modeintensity
+ (double β+ decay)

133Ba

Massagetal133
neutron number77
relative atomic mass
132,906007443 ± 0,000001065 Da
g-factor
1,5438 ± 0,0004
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
10,5379 ± 0,0016 y
spin1/2
nuclear quadrupole moment
0
ontdekkingsdatum1941
parity+

decay modeintensity
ϵ (electron capture)100%

134Ba

Massagetal134
neutron number78
relative atomic mass
133,904508249 ± 0,000000269 Da
g-factor
0
natural abundance
2,42 ± 0,15
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1936
parity+

135Ba

Massagetal135
neutron number79
relative atomic mass
134,905688447 ± 0,000000263 Da
g-factor
0,55873333333333 ± 0,00013333333333333
natural abundance
6,59 ± 0,1
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0,153 ± 0,002
ontdekkingsdatum1932
parity+

136Ba

Massagetal136
neutron number80
relative atomic mass
135,9045758 ± 0,000000262 Da
g-factor
0
natural abundance
7,85 ± 0,24
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1932
parity+

137Ba

Massagetal137
neutron number81
relative atomic mass
136,905827207 ± 0,000000266 Da
g-factor
0,625 ± 0,00013333333333333
natural abundance
11,23 ± 0,23
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0,236 ± 0,003
ontdekkingsdatum1932
parity+

138Ba

Massagetal138
neutron number82
relative atomic mass
137,905247059 ± 0,000000267 Da
g-factor
0
natural abundance
71,7 ± 0,29
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1925
parity+

139Ba

Massagetal139
neutron number83
relative atomic mass
138,908841164 ± 0,000000271 Da
g-factor
-0,278 ± 0,0014285714285714
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
82,93 ± 0,09 m
spin7/2
nuclear quadrupole moment
-0,552 ± 0,013
ontdekkingsdatum1937
parity-

decay modeintensity
β (β decay)100%

140Ba

Massagetal140
neutron number84
relative atomic mass
139,910608231 ± 0,00000848 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
12,7534 ± 0,0021 d
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1939
parity+

decay modeintensity
β (β decay)100%

141Ba

Massagetal141
neutron number85
relative atomic mass
140,914403653 ± 0,000005709 Da
g-factor
-0,22466666666667 ± 0,0033333333333333
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
18,27 ± 0,07 m
spin3/2
nuclear quadrupole moment
0,437 ± 0,01
ontdekkingsdatum1945
parity-

decay modeintensity
β (β decay)100%

142Ba

Massagetal142
neutron number86
relative atomic mass
141,916432904 ± 0,000006355 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
10,6 ± 0,2 m
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1959
parity+

decay modeintensity
β (β decay)100%

143Ba

Massagetal143
neutron number87
relative atomic mass
142,920625149 ± 0,000007253 Da
g-factor
0,1772 ± 0,0044
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
14,5 ± 0,3 s
spin5/2
nuclear quadrupole moment
-0,85 ± 0,02
ontdekkingsdatum1962
parity-

decay modeintensity
β (β decay)100%

144Ba

Massagetal144
neutron number88
relative atomic mass
143,922954821 ± 0,000007661 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
11,73 ± 0,08 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1967
parity+

decay modeintensity
β (β decay)100%

145Ba

Massagetal145
neutron number89
relative atomic mass
144,9275184 ± 0,0000091 Da
g-factor
-0,114 ± 0,0028
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
4,31 ± 0,16 s
spin5/2
nuclear quadrupole moment
1,18 ± 0,02
ontdekkingsdatum1974
parity-

decay modeintensity
β (β decay)100%

146Ba

Massagetal146
neutron number90
relative atomic mass
145,9303632 ± 0,0000019 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,15 ± 0,04 s
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1970
parity+

decay modeintensity
β (β decay)100%

147Ba

Massagetal147
neutron number91
relative atomic mass
146,9353039 ± 0,0000212 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
893 ± 1 ms
spin5/2
nuclear quadrupole moment
ontdekkingsdatum1978
parity-

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

148Ba

Massagetal148
neutron number92
relative atomic mass
147,938223 ± 0,0000016 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
620 ± 5 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1979
parity+

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

149Ba

Massagetal149
neutron number93
relative atomic mass
148,943284 ± 0,0000027 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
349 ± 4 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1993
parity-

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

150Ba

Massagetal150
neutron number94
relative atomic mass
149,9464411 ± 0,0000061 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
258 ± 5 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum1994
parity+

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

151Ba

Massagetal151
neutron number95
relative atomic mass
150,951755 ± 0,000429 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
167 ± 5 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1994
parity-

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

152Ba

Massagetal152
neutron number96
relative atomic mass
151,95533 ± 0,000429 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
139 ± 8 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2010
parity+

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

153Ba

Massagetal153
neutron number97
relative atomic mass
152,960848 ± 0,000429 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
113 ± 39 ms
spin5/2
nuclear quadrupole moment
ontdekkingsdatum2016
parity-

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

154Ba

Massagetal154
neutron number98
relative atomic mass
153,964659 ± 0,000537 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
53 ± 48 ms
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2017
parity+

decay modeintensity
β (β decay)100%
Barium 1

geskiedenis

Ontdek deurSir Humphrey Davy
ligging van ontdekkingEngland
ontdekkingsdatum1808
etimologieGreek: barys (heavy or dense).
uitspraakBAR-i-em (Engels)

source

Abundance
Abundance in Earth's crust
425 mg/kg
natural abundance (oseaan)
0,013 mg/L
natural abundance (human body)
0,00003 %
natural abundance (Meteoroïde)
0,00027 %
natural abundance (Son)
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