Promethi

Promethi (Pm)

chemical element with the atomic number of 61
Atomic Number61
Atomic Weight144.91276
mass number126
Group
Period6
Blockf
protoni61 p+
nyutroni65 n0
elektroni61 e-
Animated Bohr model of Pm (Promethi)

Physical Property

Atomic Radius
185 pm
molar volume
Covalent Radius
173 pm
Metallic Radius
ionic radius
97 pm
Crystal Radius
111 pm
Van der Waals radius
238 pm
msongamano
7.26 g/cm³
Atomic Radii Of The Elements: Promethi0102030405060708090100110120130140150160170180190200210220230240pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

nishati
proton affinity
electron affinity
ionization energy
ionization energy of Pm (Promethi)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
elektroni
Mzingo elektroni2, 8, 18, 23, 8, 2
Bohr model: Pm (Promethi)
valence electron2
Lewis structure: Pm (Promethi)
electron configuration[Xe] 4f5 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f5 6s2
Enhanced Bohr model of Pm (Promethi)
Orbital Diagram of Pm (Promethi)
oxidation number2, 3
electronegativity
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
1,315.15 K
critical pressure
critical temperature
Kiwango utatu
appearance
Rangi
Silver
appearancemetallic
refractive index
thermodynamic material property
Thermal Conductivity
17.9 W/(m K)
thermal expansion
0.000011 1/K
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
1.3 MS/m
electrical resistivity
0.00000075 m Ω
superconductivity
Uga sumaku
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure ()
lattice constant
Lattice Angles
mechanical property
hardness
bulk modulus
33 GPa
shear modulus
18 GPa
Young's modulus
46 GPa
Poisson's ratio
0.28
speed of sound
classification
CategoryLanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number28
Mendeleev Number21
Pettifor Number29
Geochemical Classrare earth & related
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
200 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
8,400
Neutron Mass Absorption
quantum number6H5/2
space group ()

Isotopes of Promethium

Stable Isotopes0
Unstable Isotopes40
Natural Isotopes0

126Pm

mass number126
neutron number65
relative atomic mass
125.957327 ± 0.000537 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin
nuclear quadrupole moment
Uvumbuzi
parity

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)

127Pm

mass number127
neutron number66
relative atomic mass
126.951358 ± 0.000429 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin3/2
nuclear quadrupole moment
Uvumbuzi
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)
p (proton emission)

128Pm

mass number128
neutron number67
relative atomic mass
127.948234 ± 0.000322 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
1 ± 0.3 s
spin4
nuclear quadrupole moment
Uvumbuzi1999
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)
p (proton emission)0%

129Pm

mass number129
neutron number68
relative atomic mass
128.942909 ± 0.000322 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.4 ± 0.9 s
spin5/2
nuclear quadrupole moment
Uvumbuzi2004
parity+

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

130Pm

mass number130
neutron number69
relative atomic mass
129.940451 ± 0.000215 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.6 ± 0.2 s
spin5
nuclear quadrupole moment
Uvumbuzi1985
parity+

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

131Pm

mass number131
neutron number70
relative atomic mass
130.935834 ± 0.000215 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
6.3 ± 0.8 s
spin11/2
nuclear quadrupole moment
Uvumbuzi1998
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

132Pm

mass number132
neutron number71
relative atomic mass
131.93384 ± 0.00016 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
6.2 ± 0.6 s
spin3
nuclear quadrupole moment
Uvumbuzi1977
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)5%

133Pm

mass number133
neutron number72
relative atomic mass
132.929782 ± 0.000054 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
13.5 ± 2.1 s
spin3/2
nuclear quadrupole moment
Uvumbuzi1977
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

134Pm

mass number134
neutron number73
relative atomic mass
133.928326 ± 0.000045 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
22 ± 1 s
spin5
nuclear quadrupole moment
Uvumbuzi1977
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

135Pm

mass number135
neutron number74
relative atomic mass
134.924785 ± 0.000089 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
49 ± 3 s
spin3/2
nuclear quadrupole moment
Uvumbuzi1975
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

136Pm

mass number136
neutron number75
relative atomic mass
135.923595949 ± 0.000074152 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
107 ± 6 s
spin7
nuclear quadrupole moment
Uvumbuzi1988
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

137Pm

mass number137
neutron number76
relative atomic mass
136.920479519 ± 0.000014 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin5/2
nuclear quadrupole moment
Uvumbuzi1975
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)

138Pm

mass number138
neutron number77
relative atomic mass
137.919576119 ± 0.000012456 Da
g-factor
1.0666666666667 ± 0.3
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
3.24 ± 0.05 m
spin3
nuclear quadrupole moment
Uvumbuzi1973
parity-

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

139Pm

mass number139
neutron number78
relative atomic mass
138.916799228 ± 0.000014587 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.15 ± 0.05 m
spin5/2
nuclear quadrupole moment
Uvumbuzi1967
parity

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

140Pm

mass number140
neutron number79
relative atomic mass
139.916035918 ± 0.000026001 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
9.2 ± 0.2 s
spin1
nuclear quadrupole moment
Uvumbuzi1966
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

141Pm

mass number141
neutron number80
relative atomic mass
140.913555081 ± 0.000015 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
20.9 ± 0.05 m
spin5/2
nuclear quadrupole moment
Uvumbuzi1952
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%

142Pm

mass number142
neutron number81
relative atomic mass
141.912890982 ± 0.00002533 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
40.5 ± 0.5 s
spin1
nuclear quadrupole moment
Uvumbuzi1959
parity+

hali ya kuozaintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)77.1%
ϵ (electron capture)22.9%

143Pm

mass number143
neutron number82
relative atomic mass
142.910938068 ± 0.00000316 Da
g-factor
1.52 ± 0.2
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
265 ± 7 d
spin5/2
nuclear quadrupole moment
Uvumbuzi1952
parity+

hali ya kuozaintensity
ϵ (electron capture)100%
e+ (positron emission)5.7%

144Pm

mass number144
neutron number83
relative atomic mass
143.912596208 ± 0.000003126 Da
g-factor
0.338 ± 0.028
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
363 ± 14 d
spin5
nuclear quadrupole moment
Uvumbuzi1952
parity-

hali ya kuozaintensity
ϵ (electron capture)100%
e+ (positron emission)8%

145Pm

mass number145
neutron number84
relative atomic mass
144.912755748 ± 0.000003011 Da
g-factor
1.52 ± 0.064
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
17.7 ± 0.4 y
spin5/2
nuclear quadrupole moment
0.23 ± 0.08
Uvumbuzi1951
parity+

hali ya kuozaintensity
ϵ (electron capture)100%
α (α emission)2.8%

146Pm

mass number146
neutron number85
relative atomic mass
145.91470224 ± 0.000004589 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
5.53 ± 0.05 y
spin3
nuclear quadrupole moment
Uvumbuzi1960
parity-

hali ya kuozaintensity
ϵ (electron capture)66%
β (β decay)34%

147Pm

mass number147
neutron number86
relative atomic mass
146.915144944 ± 0.000001382 Da
g-factor
0.73714285714286 ± 0.02
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.6234 ± 0.0002 y
spin7/2
nuclear quadrupole moment
0.74 ± 0.2
Uvumbuzi1947
parity+

hali ya kuozaintensity
β (β decay)100%

148Pm

mass number148
neutron number87
relative atomic mass
147.917481091 ± 0.000006108 Da
g-factor
2.1 ± 0.2
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
5.368 ± 0.007 d
spin1
nuclear quadrupole moment
0.2 ± 0.2
Uvumbuzi1947
parity-

hali ya kuozaintensity
β (β decay)100%

149Pm

mass number149
neutron number88
relative atomic mass
148.918341507 ± 0.000002344 Da
g-factor
0.94285714285714 ± 0.14285714285714
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
53.08 ± 0.05 h
spin7/2
nuclear quadrupole moment
Uvumbuzi1947
parity+

hali ya kuozaintensity
β (β decay)100%

150Pm

mass number150
neutron number89
relative atomic mass
149.920990014 ± 0.000021504 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.698 ± 0.015 h
spin1
nuclear quadrupole moment
Uvumbuzi1952
parity-

hali ya kuozaintensity
β (β decay)100%

151Pm

mass number151
neutron number90
relative atomic mass
150.921216613 ± 0.000004949 Da
g-factor
0.72 ± 0.08
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
28.4 ± 0.04 h
spin5/2
nuclear quadrupole moment
2.2 ± 0.9
Uvumbuzi1952
parity+

hali ya kuozaintensity
β (β decay)100%

152Pm

mass number152
neutron number91
relative atomic mass
151.923505185 ± 0.000027809 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.12 ± 0.08 m
spin1
nuclear quadrupole moment
Uvumbuzi1958
parity+

hali ya kuozaintensity
β (β decay)100%

153Pm

mass number153
neutron number92
relative atomic mass
152.924156252 ± 0.000009729 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
5.25 ± 0.02 m
spin5/2
nuclear quadrupole moment
Uvumbuzi1962
parity-

hali ya kuozaintensity
β (β decay)100%

154Pm

mass number154
neutron number93
relative atomic mass
153.926712791 ± 0.000026861 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
2.68 ± 0.07 m
spin4
nuclear quadrupole moment
Uvumbuzi1958
parity+

hali ya kuozaintensity
β (β decay)100%

155Pm

mass number155
neutron number94
relative atomic mass
154.928136951 ± 0.000005065 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
41.5 ± 0.2 s
spin5/2
nuclear quadrupole moment
Uvumbuzi1982
parity-

hali ya kuozaintensity
β (β decay)100%

156Pm

mass number156
neutron number95
relative atomic mass
155.931114059 ± 0.000001275 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
27.4 ± 0.5 s
spin4
nuclear quadrupole moment
Uvumbuzi1986
parity+

hali ya kuozaintensity
β (β decay)100%

157Pm

mass number157
neutron number96
relative atomic mass
156.933121298 ± 0.000007521 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
10.56 ± 0.1 s
spin5/2
nuclear quadrupole moment
Uvumbuzi1987
parity-

hali ya kuozaintensity
β (β decay)100%

158Pm

mass number158
neutron number97
relative atomic mass
157.936546948 ± 0.000000953 Da
g-factor
0
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
4.8 ± 0.5 s
spin0
nuclear quadrupole moment
0
Uvumbuzi1987
parity+

hali ya kuozaintensity
β (β decay)100%

159Pm

mass number159
neutron number98
relative atomic mass
158.939286409 ± 0.000010777 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
1.49 ± 0.13 s
spin5/2
nuclear quadrupole moment
Uvumbuzi1998
parity-

hali ya kuozaintensity
β (β decay)100%

160Pm

mass number160
neutron number99
relative atomic mass
159.943215272 ± 0.0000022 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
725 ± 57 ms
spin6
nuclear quadrupole moment
Uvumbuzi2012
parity-

hali ya kuozaintensity
β (β decay)100%
β n (β-delayed neutron emission)

161Pm

mass number161
neutron number100
relative atomic mass
160.946229837 ± 0.0000097 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
1.05 ± 0.15 s
spin5/2
nuclear quadrupole moment
Uvumbuzi2012
parity-

hali ya kuozaintensity
β (β decay)100%
β n (β-delayed neutron emission)

162Pm

mass number162
neutron number101
relative atomic mass
161.950574 ± 0.000322 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
630 ± 180 ms
spin2
nuclear quadrupole moment
Uvumbuzi2012
parity+

hali ya kuozaintensity
β (β decay)100%
β n (β-delayed neutron emission)

163Pm

mass number163
neutron number102
relative atomic mass
162.953881 ± 0.000429 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
255 ± 25 ms
spin5/2
nuclear quadrupole moment
Uvumbuzi2012
parity-

hali ya kuozaintensity
β (β decay)100%
β n (β-delayed neutron emission)

164Pm

mass number164
neutron number103
relative atomic mass
163.958819 ± 0.000429 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin5
nuclear quadrupole moment
Uvumbuzi2018
parity-

hali ya kuozaintensity
β (β decay)
β n (β-delayed neutron emission)

165Pm

mass number165
neutron number104
relative atomic mass
164.96278 ± 0.000537 Da
g-factor
natural abundance
Unururifu☢️ radioactive element
Nusumaisha
spin5/2
nuclear quadrupole moment
Uvumbuzi2018
parity-

hali ya kuozaintensity
β (β decay)
β n (β-delayed neutron emission)
Promethium
Promethium spectrum visible

historia

mgunduzi au mvumbuziJ.A. Marinsky, L.E. Glendenin, C.D. Coryell
location of discoveryUnited States
Uvumbuzi1945
EtimolojiaNamed for the Greek god, Prometheus.
pronunciationpro-MEE-thi-em (Kiingereza)

source

Abundance
Abundance in Earth's crust
natural abundance (Bahari)
natural abundance (Mwili)
0 %
natural abundance (Kimondo)
0 %
natural abundance (Jua)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants

1s1.2042
2p4.2562
2s16.0296
3d13.9018
3p19.4461
3s19.8154
4d33.26
4f37.866
4p30.3768
4s29.3604
5p44.586
5s42.1645
6s51.6046