Samarju[m]

Samarju[m] (Sm)

chemical element with atomic number of 62
Atomic Number62
Atomic Weight150.36
mass number152
Group
Period6
Blockf
proton62 p+
neutron90 n0
elettron62 e-
Animated Bohr model of Sm (Samarju[m])

Physical Property

Atomic Radius
185 pm
molar volume
covalent radius
172 pm
Metallic Radius
ionic radius
122 pm
Crystal Radius
136 pm
Van der Waals radius
236 pm
densità
7.52 g/cm³
Atomic Radii Of The Elements: Samarju[m]0153045607590105120135150165180195210225240pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

enerġija
proton affinity
electron affinity
ionization energy
5.64371 eV/particle
ionization energy of Sm (Samarju[m])
enthalpy of vaporization
165 kJ/mol
enthalpy of fusion
8.9 kJ/mol
standard enthalpy of formation
206.7 kJ/mol
elettron
electron shell2, 8, 18, 24, 8, 2
Bohr model: Sm (Samarju[m])
valence electron2
Lewis structure: Sm (Samarju[m])
electron configuration[Xe] 4f6 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f6 6s2
Enhanced Bohr model of Sm (Samarju[m])
Orbital Diagram of Sm (Samarju[m])
oxidation number0, 1, 2, 3
electronegativity
1.17
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
2,067.15 K
Melting Point
1,345.15 K
critical pressure
critical temperature
triple point
appearance
kulur
Silver
appearancesilvery white
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
0.0000127 1/K
molar heat capacity
29.54 J/(mol K)
Specific Heat Capacity
0.197 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
1.1 MS/m
electrical resistivity
0.00000094 m Ω
superconductivity
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.000000111 m³/Kg
magnetic susceptibility (Molar)
0.00000001669 m³/mol
magnetic susceptibility (Volume)
0.00081618
magnetic ordering
Curie temperature
Néel temperature
106 K
structure
Crystal StructureSimple Trigonal (RHL)
lattice constant
9 Å
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
hardness
bulk modulus
38 GPa
shear modulus
20 GPa
Young's modulus
50 GPa
Poisson's ratio
0.27
speed of sound
2,130 m/s
classification
CategoryLanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number27
Mendeleev Number23
Pettifor Number28
Geochemical Classrare earth & related
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
192 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
5,900
Neutron Mass Absorption
4.7
quantum number7F0
space group166 (R_3m)

Isotopes of Samarium

Stable Isotopes2
Unstable Isotopes39
Natural Isotopes7
Isotopic Composition15226.74%15226.74%15422.74%15422.74%14715.00%14715.00%14913.82%14913.82%14811.25%14811.25%1507.37%1507.37%1443.08%1443.08%

128Sm

mass number128
neutron number66
relative atomic mass
127.957971 ± 0.000537 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention
parity+

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

129Sm

mass number129
neutron number67
relative atomic mass
128.954557 ± 0.000537 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
550 ± 100 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1999
parity+

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

130Sm

mass number130
neutron number68
relative atomic mass
129.948792 ± 0.000429 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1999
parity+

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

131Sm

mass number131
neutron number69
relative atomic mass
130.946022 ± 0.000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.2 ± 0.2 s
spin5/2
nuclear quadrupole moment
time of discovery or invention1986
parity+

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

132Sm

mass number132
neutron number70
relative atomic mass
131.940805 ± 0.000322 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
4 ± 0.3 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1989
parity+

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

133Sm

mass number133
neutron number71
relative atomic mass
132.93856 ± 0.00032 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
2.89 ± 0.16 s
spin5/2
nuclear quadrupole moment
time of discovery or invention1977
parity+

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

134Sm

mass number134
neutron number72
relative atomic mass
133.93411 ± 0.00021 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
9.5 ± 0.8 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1977
parity+

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

135Sm

mass number135
neutron number73
relative atomic mass
134.93252 ± 0.000166 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
10.3 ± 0.5 s
spin7/2
nuclear quadrupole moment
time of discovery or invention1977
parity+

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

136Sm

mass number136
neutron number74
relative atomic mass
135.928275553 ± 0.000013416 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
47 ± 2 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1982
parity+

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

137Sm

mass number137
neutron number75
relative atomic mass
136.927007959 ± 0.000030718 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
45 ± 1 s
spin9/2
nuclear quadrupole moment
time of discovery or invention1986
parity-

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

138Sm

mass number138
neutron number76
relative atomic mass
137.923243988 ± 0.000012686 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3.1 ± 0.2 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1982
parity+

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

139Sm

mass number139
neutron number77
relative atomic mass
138.922296631 ± 0.000011684 Da
g-factor
-1.06 ± 0.04
natural abundance
radioactivity☢️ radioactive element
half-life
2.57 ± 0.1 m
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1971
parity+

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

140Sm

mass number140
neutron number78
relative atomic mass
139.918994714 ± 0.000013416 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
14.82 ± 0.12 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1967
parity+

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

141Sm

mass number141
neutron number79
relative atomic mass
140.918481545 ± 0.000009162 Da
g-factor
-1.48 ± 0.04
natural abundance
radioactivity☢️ radioactive element
half-life
10.2 ± 0.2 m
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1967
parity+

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

142Sm

mass number142
neutron number80
relative atomic mass
141.915209415 ± 0.000002002 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
72.49 ± 0.05 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1959
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)5%

143Sm

mass number143
neutron number81
relative atomic mass
142.914634848 ± 0.000002951 Da
g-factor
0.67333333333333 ± 0.013333333333333
natural abundance
radioactivity☢️ radioactive element
half-life
8.75 ± 0.06 m
spin3/2
nuclear quadrupole moment
0.4 ± 0.2
time of discovery or invention1956
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)40%
ϵ (electron capture)60%

144Sm

mass number144
neutron number82
relative atomic mass
143.912006285 ± 0.000001566 Da
g-factor
0
natural abundance
3.08 ± 0.04
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1933
parity+

decay modeintensity
+ (double β+ decay)

145Sm

mass number145
neutron number83
relative atomic mass
144.913417157 ± 0.000001594 Da
g-factor
-0.32 ± 0.0031428571428571
natural abundance
radioactivity☢️ radioactive element
half-life
340 ± 3 d
spin7/2
nuclear quadrupole moment
-0.6 ± 0.07
time of discovery or invention1947
parity-

decay modeintensity
ϵ (electron capture)100%

146Sm

mass number146
neutron number84
relative atomic mass
145.913046835 ± 0.000003269 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
68 ± 7 My
spin0
nuclear quadrupole moment
0
time of discovery or invention1953
parity+

decay modeintensity
α (α emission)100%

147Sm

mass number147
neutron number85
relative atomic mass
146.914904401 ± 0.000001354 Da
g-factor
-0.23114285714286 ± 0.0004
natural abundance
15 ± 0.14
radioactivity☢️ radioactive element
half-life
106.6 ± 0.5 Gy
spin7/2
nuclear quadrupole moment
-0.26 ± 0.03
time of discovery or invention1933
parity-

decay modeintensity
α (α emission)100%

148Sm

mass number148
neutron number86
relative atomic mass
147.914829233 ± 0.000001337 Da
g-factor
0
natural abundance
11.25 ± 0.09
radioactivity☢️ radioactive element
half-life
6.3 ± 1.3 Py
spin0
nuclear quadrupole moment
0
time of discovery or invention1933
parity+

decay modeintensity
α (α emission)100%

149Sm

mass number149
neutron number87
relative atomic mass
148.917191211 ± 0.000001241 Da
g-factor
-0.19077142857143 ± 0.00031428571428571
natural abundance
13.82 ± 0.1
radioactivity☢️ radioactive element
half-life
spin7/2
nuclear quadrupole moment
0.075 ± 0.008
time of discovery or invention1933
parity-

decay modeintensity
α (α emission)

150Sm

mass number150
neutron number88
relative atomic mass
149.917281993 ± 0.000001193 Da
g-factor
0
natural abundance
7.37 ± 0.09
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

151Sm

mass number151
neutron number89
relative atomic mass
150.919938859 ± 0.000001191 Da
g-factor
-0.1442 ± 0.00024
natural abundance
radioactivity☢️ radioactive element
half-life
94.6 ± 0.6 y
spin5/2
nuclear quadrupole moment
0.71 ± 0.07
time of discovery or invention1947
parity-

decay modeintensity
β (β decay)100%

152Sm

mass number152
neutron number90
relative atomic mass
151.919738646 ± 0.00000109 Da
g-factor
0
natural abundance
26.74 ± 0.09
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1933
parity+

153Sm

mass number153
neutron number91
relative atomic mass
152.922103576 ± 0.0000011 Da
g-factor
-0.014 ± 0.002
natural abundance
radioactivity☢️ radioactive element
half-life
46.2846 ± 0.0023 h
spin3/2
nuclear quadrupole moment
1.3 ± 0.12
time of discovery or invention1938
parity+

decay modeintensity
β (β decay)100%

154Sm

mass number154
neutron number92
relative atomic mass
153.922215756 ± 0.0000014 Da
g-factor
0
natural abundance
22.74 ± 0.14
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1933
parity+

decay modeintensity
(double β decay)

155Sm

mass number155
neutron number93
relative atomic mass
154.924646645 ± 0.000001429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
22.18 ± 0.06 m
spin3/2
nuclear quadrupole moment
1.13 ± 0.13
time of discovery or invention1951
parity-

decay modeintensity
β (β decay)100%

156Sm

mass number156
neutron number94
relative atomic mass
155.925538191 ± 0.000009148 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
9.4 ± 0.2 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1951
parity+

decay modeintensity
β (β decay)100%

157Sm

mass number157
neutron number95
relative atomic mass
156.928418598 ± 0.000004759 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
8.03 ± 0.07 m
spin3/2
nuclear quadrupole moment
time of discovery or invention1973
parity-

decay modeintensity
β (β decay)100%

158Sm

mass number158
neutron number96
relative atomic mass
157.929949262 ± 0.000005133 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
5.3 ± 0.03 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1970
parity+

decay modeintensity
β (β decay)100%

159Sm

mass number159
neutron number97
relative atomic mass
158.93321713 ± 0.00000637 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
11.37 ± 0.15 s
spin5/2
nuclear quadrupole moment
time of discovery or invention1986
parity-

decay modeintensity
β (β decay)100%

160Sm

mass number160
neutron number98
relative atomic mass
159.935337032 ± 0.0000021 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
9.6 ± 0.3 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1986
parity+

decay modeintensity
β (β decay)100%

161Sm

mass number161
neutron number99
relative atomic mass
160.939160062 ± 0.000007318 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4.8 ± 0.4 s
spin7/2
nuclear quadrupole moment
time of discovery or invention1998
parity+

decay modeintensity
β (β decay)100%

162Sm

mass number162
neutron number100
relative atomic mass
161.941621687 ± 0.000003782 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
2.7 ± 0.3 s
spin0
nuclear quadrupole moment
0
time of discovery or invention2005
parity+

decay modeintensity
β (β decay)100%

163Sm

mass number163
neutron number101
relative atomic mass
162.945679085 ± 0.0000079 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.3 ± 0.5 s
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2012
parity-

decay modeintensity
β (β decay)100%

164Sm

mass number164
neutron number102
relative atomic mass
163.948550061 ± 0.0000044 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
1.43 ± 0.24 s
spin0
nuclear quadrupole moment
0
time of discovery or invention2012
parity+

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

165Sm

mass number165
neutron number103
relative atomic mass
164.95329 ± 0.000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
980 ± 210 ms
spin5/2
nuclear quadrupole moment
time of discovery or invention2012
parity-

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

166Sm

mass number166
neutron number104
relative atomic mass
165.956575 ± 0.000429 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
800 ± 630 ms
spin0
nuclear quadrupole moment
0
time of discovery or invention2017
parity+

decay modeintensity
β (β decay)100%

167Sm

mass number167
neutron number105
relative atomic mass
166.962072 ± 0.000537 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin7/2
nuclear quadrupole moment
time of discovery or invention2018
parity-

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

168Sm

mass number168
neutron number106
relative atomic mass
167.966033 ± 0.000322 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Samarium 1

storja

discoverer or inventorPaul Émile Lecoq de Boisbaudran
location of discoveryFrance
time of discovery or invention1879
etimoloġijaNamed after the mineral samarskite.
pronunciationseh-MER-i-em (Ingliż)

source

Abundance
Abundance in Earth's crust
7.05 mg/kg
natural abundance (ocean)
0.00000045 mg/L
natural abundance (human body)
natural abundance (meteoroid)
0.000017 %
natural abundance (Xemx)
0.0000001 %
Abundance in Universe
0.0000005 %

Nuclear Screening Constants

1s1.2217
2p4.269
2s16.2652
3d13.7711
3p19.5815
3s19.9736
4d33.7604
4f38.4684
4p30.912
4s29.7076
5p45.719
5s43.751
6s53.9882