Europi

Europi (Eu)

chemical element with atomic number of 63
Atomic Number63
Atomic Weight151.964
Rhif màs153
Group
Period6
Blockf
Proton63 p+
Niwtron90 n0
Electron63 e-
Animated Bohr model of Eu (Europi)

Nodwedd Ffisegol

Atomic Radius
185 pm
molar volume
covalent radius
168 pm
Metallic Radius
ionic radius
117 pm
Crystal Radius
131 pm
Van der Waals radius
235 pm
density
5.24 g/cm³
Atomic Radii Of The Elements: Europi0102030405060708090100110120130140150160170180190200210220230240pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
5.670385 eV/particle
ionization energy of Eu (Europi)
enthalpy of vaporization
176 kJ/mol
enthalpy of fusion
standard enthalpy of formation
177.4 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 25, 8, 2
Bohr model: Eu (Europi)
valence electron2
Lewis structure: Eu (Europi)
trefn yr electronnau[Xe] 4f7 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f7 6s2
Enhanced Bohr model of Eu (Europi)
Orbital Diagram of Eu (Europi)
Cyflwr ocsidiad0, 2, 3
Electronegatifedd
Electrophilicity Index
1.1104548254099753 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
1,802.15 K
Melting Point
1,095.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearance
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
13.9 W/(m K)
thermal expansion
0.000035 1/K
molar heat capacity
27.66 J/(mol K)
Specific Heat Capacity
0.182 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
1.1 MS/m
Gwrthedd
0.0000009 m Ω
superconductivity
1.8 K
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.000000276 m³/Kg
magnetic susceptibility (Molar)
0.000000041942 m³/mol
magnetic susceptibility (Volume)
0.0014473
magnetic ordering
Curie temperature
Néel temperature
90.5 K
strwythur
Crystal StructureBody Centered Cubic (BCC)
lattice constant
4.61 Å
Lattice Anglesπ/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
8.3 GPa
shear modulus
7.9 GPa
Young's modulus
18 GPa
Poisson's ratio
0.15
speed of sound
classification
CategoryLanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number17
Mendeleev Number25
Pettifor Number18
Geochemical Classrare earth & related
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
184 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
4,570
Neutron Mass Absorption
0.6
quantum number8S7/2
space group229 (Im_3m)

Isotopes of Europium

Stable Isotopes1
Unstable Isotopes40
Natural Isotopes2
Isotopic Composition15352.19%15352.19%15147.81%15147.81%

130Eu

Rhif màs130
neutron number67
relative atomic mass
129.964022 ± 0.000578 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1 ± 0.4 ms
spin1
nuclear quadrupole moment
dyddiad darganfod2004
parity+

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

131Eu

Rhif màs131
neutron number68
relative atomic mass
130.957634 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.8 ± 1.9 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1998
parity+

decay modeintensity
p (proton emission)89%
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)

132Eu

Rhif màs132
neutron number69
relative atomic mass
131.954696 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)
p (proton emission)0%

133Eu

Rhif màs133
neutron number70
relative atomic mass
132.94929 ± 0.00032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod
parity+

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

134Eu

Rhif màs134
neutron number71
relative atomic mass
133.946537 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
500 ± 200 ms
spin
nuclear quadrupole moment
dyddiad darganfod1989
parity

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

135Eu

Rhif màs135
neutron number72
relative atomic mass
134.94187 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.5 ± 0.2 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1989
parity+

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

136Eu

Rhif màs136
neutron number73
relative atomic mass
135.93962 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.3 ± 0.3 s
spin6
nuclear quadrupole moment
dyddiad darganfod1987
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.09%

137Eu

Rhif màs137
neutron number74
relative atomic mass
136.935430719 ± 0.0000047 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
8.4 ± 0.5 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1982
parity+

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

138Eu

Rhif màs138
neutron number75
relative atomic mass
137.933709 ± 0.00003 Da
g-factor
0.88333333333333 ± 0.11666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin2
nuclear quadrupole moment
dyddiad darganfod1982
parity-

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

139Eu

Rhif màs139
neutron number76
relative atomic mass
138.929792307 ± 0.000014117 Da
g-factor
1.1090909090909 ± 0.14545454545455
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.9 ± 0.6 s
spin11/2
nuclear quadrupole moment
dyddiad darganfod1975
parity

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

140Eu

Rhif màs140
neutron number77
relative atomic mass
139.928087633 ± 0.000055328 Da
g-factor
1.362 ± 0.013
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.51 ± 0.02 s
spin1
nuclear quadrupole moment
dyddiad darganfod1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)95.1%
ϵ (electron capture)4.9%

141Eu

Rhif màs141
neutron number78
relative atomic mass
140.924931734 ± 0.000013568 Da
g-factor
1.3944 ± 0.0032
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
40.7 ± 0.7 s
spin5/2
nuclear quadrupole moment
0.85 ± 0.04
dyddiad darganfod1977
parity+

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

142Eu

Rhif màs142
neutron number79
relative atomic mass
141.923446719 ± 0.000032268 Da
g-factor
1.532 ± 0.019
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.36 ± 0.1 s
spin1
nuclear quadrupole moment
0.12 ± 0.05
dyddiad darganfod1966
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)89.9%
ϵ (electron capture)10.1%

143Eu

Rhif màs143
neutron number80
relative atomic mass
142.920298678 ± 0.000011793 Da
g-factor
1.4656 ± 0.0032
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.59 ± 0.02 m
spin5/2
nuclear quadrupole moment
0.51 ± 0.03
dyddiad darganfod1965
parity+

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

144Eu

Rhif màs144
neutron number81
relative atomic mass
143.918819481 ± 0.00001158 Da
g-factor
1.888 ± 0.013
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
10.2 ± 0.1 s
spin1
nuclear quadrupole moment
0.1 ± 0.03
dyddiad darganfod1965
parity+

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

145Eu

Rhif màs145
neutron number82
relative atomic mass
144.916272659 ± 0.000003285 Da
g-factor
1.5932 ± 0.0028
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.93 ± 0.04 d
spin5/2
nuclear quadrupole moment
0.29 ± 0.02
dyddiad darganfod1951
parity+

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

146Eu

Rhif màs146
neutron number83
relative atomic mass
145.917210852 ± 0.000006451 Da
g-factor
0.3555 ± 0.00275
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.61 ± 0.03 d
spin4
nuclear quadrupole moment
-0.18 ± 0.06
dyddiad darganfod1957
parity-

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

147Eu

Rhif màs147
neutron number84
relative atomic mass
146.91675244 ± 0.000002758 Da
g-factor
1.486 ± 0.0032
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
24.1 ± 0.6 d
spin5/2
nuclear quadrupole moment
0.55 ± 0.03
dyddiad darganfod1951
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.0022%

148Eu

Rhif màs148
neutron number85
relative atomic mass
147.918091288 ± 0.000010693 Da
g-factor
0.4668 ± 0.002
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
54.5 ± 0.5 d
spin5
nuclear quadrupole moment
0.35 ± 0.06
dyddiad darganfod1951
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)9.4%

149Eu

Rhif màs149
neutron number86
relative atomic mass
148.917936875 ± 0.00000419 Da
g-factor
1.4224 ± 0.0024
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
93.1 ± 0.4 d
spin5/2
nuclear quadrupole moment
0.75 ± 0.02
dyddiad darganfod1959
parity+

decay modeintensity
ϵ (electron capture)100%

150Eu

Rhif màs150
neutron number87
relative atomic mass
149.919707092 ± 0.000006688 Da
g-factor
0.5404 ± 0.0022
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
36.9 ± 0.9 y
spin5
nuclear quadrupole moment
1.13 ± 0.05
dyddiad darganfod1950
parity-

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

151Eu

Rhif màs151
neutron number88
relative atomic mass
150.919856606 ± 0.000001251 Da
g-factor
1.3854 ± 0.001
natural abundance
47.81 ± 0.06
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.6 ± 1.2 Ey
spin5/2
nuclear quadrupole moment
0.903 ± 0.01
dyddiad darganfod1933
parity+

decay modeintensity
α (α emission)100%

152Eu

Rhif màs152
neutron number89
relative atomic mass
151.92175098 ± 0.000001252 Da
g-factor
-0.64513333333333 ± 0.00056666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13.517 ± 0.006 y
spin3
nuclear quadrupole moment
2.72 ± 0.03
dyddiad darganfod1938
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)72.08%
β (β decay)27.92%

153Eu

Rhif màs153
neutron number90
relative atomic mass
152.921236789 ± 0.000001257 Da
g-factor
0.61176 ± 0.00044
natural abundance
52.19 ± 0.06
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin5/2
nuclear quadrupole moment
2.41 ± 0.02
dyddiad darganfod1933
parity+

154Eu

Rhif màs154
neutron number91
relative atomic mass
153.922985699 ± 0.000001275 Da
g-factor
-0.66666666666667 ± 0.002
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
8.592 ± 0.003 y
spin3
nuclear quadrupole moment
2.85 ± 0.1
dyddiad darganfod1947
parity-

decay modeintensity
β (β decay)99.982%
ϵ (electron capture)0.018%

155Eu

Rhif màs155
neutron number92
relative atomic mass
154.922899847 ± 0.000001343 Da
g-factor
0.6064 ± 0.0008
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.742 ± 0.008 y
spin5/2
nuclear quadrupole moment
2.5 ± 0.3
dyddiad darganfod1947
parity+

decay modeintensity
β (β decay)100%

156Eu

Rhif màs156
neutron number93
relative atomic mass
155.924762976 ± 0.000003791 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
15.19 ± 0.08 d
spin0
nuclear quadrupole moment
0
dyddiad darganfod1947
parity+

decay modeintensity
β (β decay)100%

157Eu

Rhif màs157
neutron number94
relative atomic mass
156.925432556 ± 0.000004545 Da
g-factor
0.6 ± 0.008
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
15.18 ± 0.03 h
spin5/2
nuclear quadrupole moment
2.6 ± 0.3
dyddiad darganfod1951
parity+

decay modeintensity
β (β decay)100%

158Eu

Rhif màs158
neutron number95
relative atomic mass
157.927782192 ± 0.000002181 Da
g-factor
1.44 ± 0.02
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
45.9 ± 0.2 m
spin1
nuclear quadrupole moment
0.66 ± 0.14
dyddiad darganfod1951
parity-

decay modeintensity
β (β decay)100%

159Eu

Rhif màs159
neutron number96
relative atomic mass
158.929099512 ± 0.000004637 Da
g-factor
0.552 ± 0.008
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
18.1 ± 0.1 m
spin5/2
nuclear quadrupole moment
2.7 ± 0.3
dyddiad darganfod1961
parity+

decay modeintensity
β (β decay)100%

160Eu

Rhif màs160
neutron number97
relative atomic mass
159.931836982 ± 0.00000097 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
42.6 ± 0.5 s
spin5
nuclear quadrupole moment
dyddiad darganfod1973
parity-

decay modeintensity
β (β decay)100%

161Eu

Rhif màs161
neutron number98
relative atomic mass
160.933663991 ± 0.000011164 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
26.2 ± 2.3 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1986
parity+

decay modeintensity
β (β decay)100%

162Eu

Rhif màs162
neutron number99
relative atomic mass
161.936958329 ± 0.00000141 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1
nuclear quadrupole moment
dyddiad darganfod1987
parity+

decay modeintensity
β (β decay)100%

163Eu

Rhif màs163
neutron number100
relative atomic mass
162.93926551 ± 0.00000097 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
7.7 ± 0.4 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod2007
parity+

decay modeintensity
β (β decay)100%

164Eu

Rhif màs164
neutron number101
relative atomic mass
163.942852943 ± 0.000002219 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.16 ± 0.19 s
spin3
nuclear quadrupole moment
dyddiad darganfod2007
parity-

decay modeintensity
β (β decay)100%

165Eu

Rhif màs165
neutron number102
relative atomic mass
164.94554007 ± 0.000005596 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.53 ± 0.25 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod2007
parity+

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

166Eu

Rhif màs166
neutron number103
relative atomic mass
165.949813 ± 0.000107 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.24 ± 0.12 s
spin0
nuclear quadrupole moment
0
dyddiad darganfod2007
parity-

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

167Eu

Rhif màs167
neutron number104
relative atomic mass
166.953011 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.33 ± 0.51 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod2012
parity+

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

168Eu

Rhif màs168
neutron number105
relative atomic mass
167.957863 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
200 ± 100 ms
spin6
nuclear quadrupole moment
dyddiad darganfod2012
parity-

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

169Eu

Rhif màs169
neutron number106
relative atomic mass
168.961717 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod2018
parity+

decay modeintensity
β (β decay)

170Eu

Rhif màs170
neutron number107
relative atomic mass
169.96687 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod
parity

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Eu-Block

hanes

darganfyddwr neu ddyfeisiwrEugène Demarçay
man darganfodFrance
dyddiad darganfod1901
geirdarddiadNamed for the continent of Europe.
ynganiadyoo-RO-pi-em (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
0.00000013 mg/L
natural abundance (corff dynol)
natural abundance (Awyrfaen)
0.0000059 %
natural abundance (Haul)
0.00000005 %
Abundance in Universe
0.00000005 %

Nuclear Screening Constants

1s1.2391
2p4.282
2s16.5292
3d13.7472
3p19.716
3s20.1318
4d34.0592
4f38.68
4p31.1252
4s30.132
5p46.445
5s44.41
6s54.8784