Europi (Eu)

chemical element with atomic number of 63

Atomic Number	63
Atomic Weight	151.964
Rhif màs	153

Group
Period	6
Block	f

Proton	63 p⁺
Niwtron	90 n⁰
Electron	63 e^-

Nodwedd Ffisegol

Atomic Radius	185 pm 280 pm
molar volume	28.9 cm³/mol
covalent radius	168 pm 134 pm 198 pm
Metallic Radius
ionic radius	117 pm 120 pm 125 pm 130 pm 135 pm 94.7 pm 101 pm 106.6 pm 112 pm
Crystal Radius	131 pm 134 pm 139 pm 144 pm 149 pm 108.7 pm 115 pm 120.6 pm 126 pm
Van der Waals radius	235 pm 294 pm 349.3 pm
density	5.24 g/cm³ 5,130 kg/m³

Nodwedd Gemegol

egni

proton affinity
electron affinity	0.864 eV/particle
ionization energy	5.670385 eV/particle 11.241 eV/particle 24.9 eV/particle 42.7 eV/particle 63 eV/particle 88 eV/particle 105 eV/particle 120 eV/particle 144 eV/particle 161 eV/particle 183 eV/particle 213 eV/particle 243 eV/particle 263 eV/particle 281 eV/particle 311 eV/particle 344.4 eV/particle 518 eV/particle 553 eV/particle 590 eV/particle 630 eV/particle 667 eV/particle 709 eV/particle 755 eV/particle 795 eV/particle 838 eV/particle 879 eV/particle 1,037 eV/particle 1,078 eV/particle 1,124 eV/particle 1,167 eV/particle 1,249 eV/particle 1,296 eV/particle 1,406 eV/particle 1,456.06 eV/particle 2,495 eV/particle 2,591 eV/particle 2,697 eV/particle 2,807 eV/particle 2,914 eV/particle 3,022 eV/particle 3,168 eV/particle 3,279 eV/particle 3,398 eV/particle 3,510 eV/particle 3,823 eV/particle 3,921 eV/particle 4,031 eV/particle 4,131 eV/particle 4,400 eV/particle 4,510 eV/particle 4,729 eV/particle 4,838 eV/particle 10,880 eV/particle 11,153 eV/particle 11,457 eV/particle 11,739 eV/particle 12,718 eV/particle 13,050 eV/particle 13,462 eV/particle 13,738.58 eV/particle 55,865.9 eV/particle 57,120.6 eV/particle

enthalpy of vaporization	176 kJ/mol
enthalpy of fusion
standard enthalpy of formation	177.4 kJ/mol
Electron

plisgyn yr electron	2, 8, 18, 25, 8, 2

valence electron	2 ⓘ

trefn yr electronnau	[Xe] 4f⁷ 6s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f⁷ 6s²

Cyflwr ocsidiad	0, 2, 3
Electronegatifedd	0.189935
Electrophilicity Index	1.1104548254099753 eV/particle
cyflwr sylfaenol mater

cyflwr mater	Solid
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 #ff1493 #61ffc7 #61ffc7
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
type	Conductor
dargludedd trydanol	1.1 MS/m
Gwrthedd	0.0000009 Ω*m
superconductivity	1.8 K
magnetism
type	paramagnetic
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 Structure	Body Centered Cubic (BCC)
lattice constant	4.61 Å
Lattice Angles	π/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness	167 MPa
bulk modulus	8.3 GPa
shear modulus	7.9 GPa
Young's modulus	18 GPa
Poisson's ratio	0.15
speed of sound
classification
Category	Lanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number	17
Mendeleev Number	25
Pettifor Number	18
Geochemical Class	rare earth & related
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	184 ± 20 a₀
C6 Dispersion Coefficient	2,940 a₀
allotrope
Neutron cross section	4,570
Neutron Mass Absorption	0.6
quantum number	8S7/2
space group	229 (Im_3m)

Isotopes of Europium

Stable Isotopes	1
Unstable Isotopes	40
Natural Isotopes	2

¹³⁰Eu

Rhif màs	130
neutron number	67
Relative Atomic Mass	129.964022 ± 0.000578 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1 ± 0.4 ms
spin	1
nuclear quadrupole moment
dyddiad darganfod	2004
parity	+

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

¹³¹Eu

Rhif màs	131
neutron number	68
Relative Atomic Mass	130.957634 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	17.8 ± 1.9 ms
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	1998
parity	+

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

¹³²Eu

Rhif màs	132
neutron number	69
Relative Atomic Mass	131.954696 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	1
nuclear quadrupole moment
dyddiad darganfod
parity	+

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

¹³³Eu

Rhif màs	133
neutron number	70
Relative Atomic Mass	132.94929 ± 0.00032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	5/2
nuclear quadrupole moment
dyddiad darganfod
parity	+

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

¹³⁴Eu

Rhif màs	134
neutron number	71
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 darganfod	1989
parity

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

¹³⁵Eu

Rhif màs	135
neutron number	72
Relative Atomic Mass	134.94187 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.5 ± 0.2 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1989
parity	+

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

¹³⁶Eu

Rhif màs	136
neutron number	73
Relative Atomic Mass	135.93962 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	3.3 ± 0.3 s
spin	6
nuclear quadrupole moment
dyddiad darganfod	1987
parity	+

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

¹³⁷Eu

Rhif màs	137
neutron number	74
Relative Atomic Mass	136.935430719 ± 0.0000047 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	8.4 ± 0.5 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1982
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁸Eu

Rhif màs	138
neutron number	75
Relative Atomic Mass	137.933709 ± 0.00003 Da
g-factor	0.88333333333333 ± 0.11666666666667
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	2
nuclear quadrupole moment
dyddiad darganfod	1982
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹³⁹Eu

Rhif màs	139
neutron number	76
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
spin	11/2
nuclear quadrupole moment
dyddiad darganfod	1975
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴⁰Eu

Rhif màs	140
neutron number	77
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
spin	1
nuclear quadrupole moment
dyddiad darganfod	1982
parity	+

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

¹⁴¹Eu

Rhif màs	141
neutron number	78
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
spin	5/2
nuclear quadrupole moment	0.85 ± 0.04
dyddiad darganfod	1977
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴²Eu

Rhif màs	142
neutron number	79
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
spin	1
nuclear quadrupole moment	0.12 ± 0.05
dyddiad darganfod	1966
parity	+

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

¹⁴³Eu

Rhif màs	143
neutron number	80
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
spin	5/2
nuclear quadrupole moment	0.51 ± 0.03
dyddiad darganfod	1965
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴⁴Eu

Rhif màs	144
neutron number	81
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
spin	1
nuclear quadrupole moment	0.1 ± 0.03
dyddiad darganfod	1965
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴⁵Eu

Rhif màs	145
neutron number	82
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
spin	5/2
nuclear quadrupole moment	0.29 ± 0.02
dyddiad darganfod	1951
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴⁶Eu

Rhif màs	146
neutron number	83
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
spin	4
nuclear quadrupole moment	-0.18 ± 0.06
dyddiad darganfod	1957
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴⁷Eu

Rhif màs	147
neutron number	84
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
spin	5/2
nuclear quadrupole moment	0.55 ± 0.03
dyddiad darganfod	1951
parity	+

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

¹⁴⁸Eu

Rhif màs	148
neutron number	85
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
spin	5
nuclear quadrupole moment	0.35 ± 0.06
dyddiad darganfod	1951
parity	-

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

¹⁴⁹Eu

Rhif màs	149
neutron number	86
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
spin	5/2
nuclear quadrupole moment	0.75 ± 0.02
dyddiad darganfod	1959
parity	+

decay mode	intensity
ϵ (electron capture)	100%

¹⁵⁰Eu

Rhif màs	150
neutron number	87
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
spin	5
nuclear quadrupole moment	1.13 ± 0.05
dyddiad darganfod	1950
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁵¹Eu

Rhif màs	151
neutron number	88
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
spin	5/2
nuclear quadrupole moment	0.903 ± 0.01
dyddiad darganfod	1933
parity	+

decay mode	intensity
α (α emission)	100%

¹⁵²Eu

Rhif màs	152
neutron number	89
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
spin	3
nuclear quadrupole moment	2.72 ± 0.03
dyddiad darganfod	1938
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	72.08%
β⁻ (β⁻ decay)	27.92%

¹⁵³Eu

Rhif màs	153
neutron number	90
Relative Atomic Mass	152.921236789 ± 0.000001257 Da
g-factor	0.61176 ± 0.00044
natural abundance	52.19 ± 0.06
Dadfeilio ymbelydrol	stable isotope
Hanner oes	Not Radioactive ☢️
spin	5/2
nuclear quadrupole moment	2.41 ± 0.02
dyddiad darganfod	1933
parity	+

¹⁵⁴Eu

Rhif màs	154
neutron number	91
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
spin	3
nuclear quadrupole moment	2.85 ± 0.1
dyddiad darganfod	1947
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	99.982%
ϵ (electron capture)	0.018%

¹⁵⁵Eu

Rhif màs	155
neutron number	92
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
spin	5/2
nuclear quadrupole moment	2.5 ± 0.3
dyddiad darganfod	1947
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁶Eu

Rhif màs	156
neutron number	93
Relative Atomic Mass	155.924762976 ± 0.000003791 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	15.19 ± 0.08 d
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1947
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁷Eu

Rhif màs	157
neutron number	94
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
spin	5/2
nuclear quadrupole moment	2.6 ± 0.3
dyddiad darganfod	1951
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁸Eu

Rhif màs	158
neutron number	95
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
spin	1
nuclear quadrupole moment	0.66 ± 0.14
dyddiad darganfod	1951
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁹Eu

Rhif màs	159
neutron number	96
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
spin	5/2
nuclear quadrupole moment	2.7 ± 0.3
dyddiad darganfod	1961
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶⁰Eu

Rhif màs	160
neutron number	97
Relative Atomic Mass	159.931836982 ± 0.00000097 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	42.6 ± 0.5 s
spin	5
nuclear quadrupole moment
dyddiad darganfod	1973
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶¹Eu

Rhif màs	161
neutron number	98
Relative Atomic Mass	160.933663991 ± 0.000011164 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	26.2 ± 2.3 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1986
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶²Eu

Rhif màs	162
neutron number	99
Relative Atomic Mass	161.936958329 ± 0.00000141 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	1
nuclear quadrupole moment
dyddiad darganfod	1987
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶³Eu

Rhif màs	163
neutron number	100
Relative Atomic Mass	162.93926551 ± 0.00000097 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	7.7 ± 0.4 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	2007
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶⁴Eu

Rhif màs	164
neutron number	101
Relative Atomic Mass	163.942852943 ± 0.000002219 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	4.16 ± 0.19 s
spin	3
nuclear quadrupole moment
dyddiad darganfod	2007
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁶⁵Eu

Rhif màs	165
neutron number	102
Relative Atomic Mass	164.94554007 ± 0.000005596 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.53 ± 0.25 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	2007
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁶Eu

Rhif màs	166
neutron number	103
Relative Atomic Mass	165.949813 ± 0.000107 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.24 ± 0.12 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	2007
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁷Eu

Rhif màs	167
neutron number	104
Relative Atomic Mass	166.953011 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.33 ± 0.51 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	2012
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁸Eu

Rhif màs	168
neutron number	105
Relative Atomic Mass	167.957863 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	200 ± 100 ms
spin	6
nuclear quadrupole moment
dyddiad darganfod	2012
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁹Eu

Rhif màs	169
neutron number	106
Relative Atomic Mass	168.961717 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	2018
parity	+

decay mode	intensity
β⁻ (β⁻ decay)

¹⁷⁰Eu

Rhif màs	170
neutron number	107
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 mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

hanes

darganfyddwr neu ddyfeisiwr	Eugène Demarçay
man darganfod	France
dyddiad darganfod	1901
geirdarddiad	Named for the continent of Europe.
ynganiad	yoo-RO-pi-em (Saesneg)

source

Abundance
Abundance in Earth's crust	2 mg/kg
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

1	s	1.2391
2	p	4.282
2	s	16.5292
3	d	13.7472
3	p	19.716
3	s	20.1318
4	d	34.0592
4	f	38.68
4	p	31.1252
4	s	30.132
5	p	46.445
5	s	44.41
6	s	54.8784

Europi on ChemicalAid

Australian Educational Vocabulary ID	scot/3518
CAB ID	154848
ChEBI ID	32999
ChemSpider ID	22417
DSSTOX compound identifier	DTXCID0047660
DSSTox substance ID	DTXSID3064695
Den Store Danske ID	europium
ECHA Substance Infocard ID	100.028.328
Elhuyar ZTH ID	023875
Encyclopedia of China ID (Second Edition)	243832
French Vikidia ID	Europium
GND	4153210-7
Great Russian Encyclopedia Online ID	1974896
ID NALT	38725
InChI	InChI=1S/Eu
InChIKey	OGPBJKLSAFTDLK-UHFFFAOYSA-N
Namuwiki ID	유로퓸
National Library of Israel J9U ID	987007560305105171
OmegaWiki Defined Meaning	158490
OpenAlex ID	C502696234
PubChem CID	23981
Rhif Cofrestru CAS	7440-53-1
RxNorm ID	1311484
Store norske leksikon ID	europium
UNII	444W947O8O
USGS Thesaurus ID	1450
WordNet 3.1 Synset ID	14661354-n
ZVG number	7630
dynodwr Encyclopædia Britannica Online	science/europium
dynodwr Encyclopædia Universalis	europium
dynodwr Freebase	/m/028bf0d
dynodwr Gran Enciclopèdia Catalana	0107121
dynodwr ILI	i113931
dynodwr KBpedia	Europium
dynodwr LCAuth	sh85045863
dynodwr MeSH	D005063
dynodwr Treccani	europio

Europi (Eu)

Nodwedd Ffisegol

Nodwedd Gemegol

other

Isotopes of Europium

130Eu

131Eu

132Eu

133Eu

134Eu

135Eu

136Eu

137Eu

138Eu

139Eu

140Eu

141Eu

142Eu

143Eu

144Eu

145Eu

146Eu

147Eu

148Eu

149Eu

150Eu

151Eu

152Eu

153Eu

154Eu

155Eu

156Eu

157Eu

158Eu

159Eu

160Eu

161Eu

162Eu

163Eu

164Eu

165Eu

166Eu

167Eu

168Eu

169Eu

170Eu

hanes

source

Nuclear Screening Constants

¹³⁰Eu

¹³¹Eu

¹³²Eu

¹³³Eu

¹³⁴Eu

¹³⁵Eu

¹³⁶Eu

¹³⁷Eu

¹³⁸Eu

¹³⁹Eu

¹⁴⁰Eu

¹⁴¹Eu

¹⁴²Eu

¹⁴³Eu

¹⁴⁴Eu

¹⁴⁵Eu

¹⁴⁶Eu

¹⁴⁷Eu

¹⁴⁸Eu

¹⁴⁹Eu

¹⁵⁰Eu

¹⁵¹Eu

¹⁵²Eu

¹⁵³Eu

¹⁵⁴Eu

¹⁵⁵Eu

¹⁵⁶Eu

¹⁵⁷Eu

¹⁵⁸Eu

¹⁵⁹Eu

¹⁶⁰Eu

¹⁶¹Eu

¹⁶²Eu

¹⁶³Eu

¹⁶⁴Eu

¹⁶⁵Eu

¹⁶⁶Eu

¹⁶⁷Eu

¹⁶⁸Eu

¹⁶⁹Eu

¹⁷⁰Eu