Praseodimi

Praseodimi (Pr)

element with the atomic number of 59
Atomic Number59
Atomic Weight140.90766
Rhif màs141
Group
Period6
Blockf
Proton59 p+
Niwtron82 n0
Electron59 e-
Animated Bohr model of Pr (Praseodimi)

Nodwedd Ffisegol

Atomic Radius
185 pm
molar volume
covalent radius
176 pm
Metallic Radius
ionic radius
99 pm
Crystal Radius
113 pm
Van der Waals radius
240 pm
density
6.773 g/cm³
Atomic Radii Of The Elements: Praseodimi0102030405060708090100110120130140150160170180190200210220230240pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
ionization energy of Pr (Praseodimi)
enthalpy of vaporization
331 kJ/mol
enthalpy of fusion
11.3 kJ/mol
standard enthalpy of formation
356.9 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 21, 8, 2
Bohr model: Pr (Praseodimi)
valence electron2
Lewis structure: Pr (Praseodimi)
trefn yr electronnau[Xe] 4f3 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f3 6s2
Enhanced Bohr model of Pr (Praseodimi)
Orbital Diagram of Pr (Praseodimi)
Cyflwr ocsidiad0, 1, 2, 3, 4, 5
Electronegatifedd
1.13
Electrophilicity Index
1.1474513688760803 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
3,793.15 K
Melting Point
1,204.15 K
critical pressure
critical temperature
triple point
appearance
lliw
Silver
appearancegrayish white
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
12.5 W/(m K)
thermal expansion
0.0000067 1/K
molar heat capacity
Specific Heat Capacity
0.193 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
1.4 MS/m
Gwrthedd
0.0000007 m Ω
superconductivity
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.000000423 m³/Kg
magnetic susceptibility (Molar)
0.000000059604 m³/mol
magnetic susceptibility (Volume)
0.0028087
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureSimple Hexagonal (HEX)
lattice constant
3.67 Å
Lattice Anglesπ/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
29 GPa
shear modulus
15 GPa
Young's modulus
37 GPa
Poisson's ratio
0.28
speed of sound
2,280 m/s
classification
CategoryLanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number30
Mendeleev Number17
Pettifor Number31
Geochemical Classrare earth & related
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
216 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
11.4
Neutron Mass Absorption
0.0029
quantum number4I9/2
space group194 (P63/mmc)

Isotopes of Praseodymium

Stable Isotopes1
Unstable Isotopes40
Natural Isotopes1

121Pr

Rhif màs121
neutron number62
relative atomic mass
120.955393 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
12 ± 5 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod2005
parity

decay modeintensity
p (proton emission)100%

122Pr

Rhif màs122
neutron number63
relative atomic mass
121.951927 ± 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+ = ϵ + e+)
β+ p (β+-delayed proton emission)

123Pr

Rhif màs123
neutron number64
relative atomic mass
122.946076 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod
parity+

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

124Pr

Rhif màs124
neutron number65
relative atomic mass
123.94294 ± 0.00043 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.2 ± 0.2 s
spin
nuclear quadrupole moment
dyddiad darganfod1986
parity

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

125Pr

Rhif màs125
neutron number66
relative atomic mass
124.937659 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.3 ± 0.7 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod2002
parity+

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

126Pr

Rhif màs126
neutron number67
relative atomic mass
125.93524 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.12 ± 0.18 s
spin4
nuclear quadrupole moment
dyddiad darganfod1983
parity

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

127Pr

Rhif màs127
neutron number68
relative atomic mass
126.93071 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.2 ± 0.3 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1995
parity+

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

128Pr

Rhif màs128
neutron number69
relative atomic mass
127.928791 ± 0.000032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.85 ± 0.09 s
spin3
nuclear quadrupole moment
dyddiad darganfod1985
parity+

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

129Pr

Rhif màs129
neutron number70
relative atomic mass
128.925095 ± 0.000032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
30 ± 4 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1977
parity+

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

130Pr

Rhif màs130
neutron number71
relative atomic mass
129.92359 ± 0.000069 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
40 ± 0.4 s
spin6
nuclear quadrupole moment
dyddiad darganfod1977
parity

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

131Pr

Rhif màs131
neutron number72
relative atomic mass
130.92023496 ± 0.000050451 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.5 ± 0.03 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1977
parity+

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

132Pr

Rhif màs132
neutron number73
relative atomic mass
131.91924 ± 0.000031 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.49 ± 0.11 m
spin2
nuclear quadrupole moment
dyddiad darganfod1974
parity+

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

133Pr

Rhif màs133
neutron number74
relative atomic mass
132.916330558 ± 0.000013416 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
6.5 ± 0.3 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1970
parity+

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

134Pr

Rhif màs134
neutron number75
relative atomic mass
133.915696729 ± 0.00002181 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17 ± 2 m
spin2
nuclear quadrupole moment
dyddiad darganfod1967
parity-

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

135Pr

Rhif màs135
neutron number76
relative atomic mass
134.913111772 ± 0.000012686 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
24 ± 1 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1954
parity+

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

136Pr

Rhif màs136
neutron number77
relative atomic mass
135.91267747 ± 0.000012296 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13.1 ± 0.1 m
spin2
nuclear quadrupole moment
dyddiad darganfod1968
parity+

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

137Pr

Rhif màs137
neutron number78
relative atomic mass
136.910679183 ± 0.000008733 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.28 ± 0.03 h
spin5/2
nuclear quadrupole moment
dyddiad darganfod1958
parity+

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

138Pr

Rhif màs138
neutron number79
relative atomic mass
137.910757495 ± 0.000010748 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.45 ± 0.05 m
spin1
nuclear quadrupole moment
dyddiad darganfod1951
parity+

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

139Pr

Rhif màs139
neutron number80
relative atomic mass
138.9089327 ± 0.000003917 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.41 ± 0.04 h
spin5/2
nuclear quadrupole moment
dyddiad darganfod1951
parity+

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

140Pr

Rhif màs140
neutron number81
relative atomic mass
139.9090856 ± 0.000006593 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.39 ± 0.01 m
spin1
nuclear quadrupole moment
dyddiad darganfod1938
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)48.7%
ϵ (electron capture)51.3%

141Pr

Rhif màs141
neutron number82
relative atomic mass
140.907659604 ± 0.000001607 Da
g-factor
1.7064 ± 0.0012
natural abundance
100
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin5/2
nuclear quadrupole moment
-0.077 ± 0.006
dyddiad darganfod1924
parity+

142Pr

Rhif màs142
neutron number83
relative atomic mass
141.91005164 ± 0.000001607 Da
g-factor
0.117 ± 0.0005
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
19.12 ± 0.04 h
spin2
nuclear quadrupole moment
0.039 ± 0.017
dyddiad darganfod1935
parity-

decay modeintensity
β (β decay)100%
ϵ (electron capture)0.0164%

143Pr

Rhif màs143
neutron number84
relative atomic mass
142.910822624 ± 0.000001949 Da
g-factor
0.77 ± 0.0014285714285714
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13.57 ± 0.02 d
spin7/2
nuclear quadrupole moment
0.77 ± 0.16
dyddiad darganfod1948
parity+

decay modeintensity
β (β decay)100%

144Pr

Rhif màs144
neutron number85
relative atomic mass
143.913310682 ± 0.000002907 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.28 ± 0.05 m
spin0
nuclear quadrupole moment
0
dyddiad darganfod1951
parity-

decay modeintensity
β (β decay)100%

145Pr

Rhif màs145
neutron number86
relative atomic mass
144.914517987 ± 0.000007674 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
5.984 ± 0.01 h
spin7/2
nuclear quadrupole moment
dyddiad darganfod1954
parity+

decay modeintensity
β (β decay)100%

146Pr

Rhif màs146
neutron number87
relative atomic mass
145.91768763 ± 0.000036882 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
24.09 ± 0.1 m
spin2
nuclear quadrupole moment
dyddiad darganfod1953
parity-

decay modeintensity
β (β decay)100%

147Pr

Rhif màs147
neutron number88
relative atomic mass
146.919007438 ± 0.00001702 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13.39 ± 0.04 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1964
parity+

decay modeintensity
β (β decay)100%

148Pr

Rhif màs148
neutron number89
relative atomic mass
147.922129992 ± 0.000016147 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.29 ± 0.02 m
spin1
nuclear quadrupole moment
dyddiad darganfod1964
parity-

decay modeintensity
β (β decay)100%

149Pr

Rhif màs149
neutron number90
relative atomic mass
148.9237361 ± 0.0000106 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.26 ± 0.07 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1964
parity+

decay modeintensity
β (β decay)100%

150Pr

Rhif màs150
neutron number91
relative atomic mass
149.926676391 ± 0.000009677 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
6.19 ± 0.16 s
spin1
nuclear quadrupole moment
dyddiad darganfod1970
parity-

decay modeintensity
β (β decay)100%

151Pr

Rhif màs151
neutron number92
relative atomic mass
150.928309066 ± 0.000012506 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
18.9 ± 0.07 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1990
parity-

decay modeintensity
β (β decay)100%

152Pr

Rhif màs152
neutron number93
relative atomic mass
151.9315529 ± 0.0000199 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.57 ± 0.11 s
spin4
nuclear quadrupole moment
dyddiad darganfod1983
parity+

decay modeintensity
β (β decay)100%

153Pr

Rhif màs153
neutron number94
relative atomic mass
152.933903511 ± 0.000012755 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
4.28 ± 0.11 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1987
parity-

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

154Pr

Rhif màs154
neutron number95
relative atomic mass
153.937885165 ± 0.00010736 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.3 ± 0.09 s
spin3
nuclear quadrupole moment
dyddiad darganfod1988
parity+

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

155Pr

Rhif màs155
neutron number96
relative atomic mass
154.940509193 ± 0.000018462 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.47 ± 0.3 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1992
parity-

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

156Pr

Rhif màs156
neutron number97
relative atomic mass
155.9447669 ± 0.0000011 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
444 ± 6 ms
spin1
nuclear quadrupole moment
dyddiad darganfod1992
parity+

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

157Pr

Rhif màs157
neutron number98
relative atomic mass
156.9480031 ± 0.0000034 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
307 ± 21 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod2017
parity-

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

158Pr

Rhif màs158
neutron number99
relative atomic mass
157.952603 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
181 ± 14 ms
spin5
nuclear quadrupole moment
dyddiad darganfod2016
parity-

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

159Pr

Rhif màs159
neutron number100
relative atomic mass
158.956232 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
134 ± 43 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod2017
parity-

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

160Pr

Rhif màs160
neutron number101
relative atomic mass
159.961138 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
170 ± 140 ms
spin1
nuclear quadrupole moment
dyddiad darganfod2017
parity+

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

161Pr

Rhif màs161
neutron number102
relative atomic mass
160.965121 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod2018
parity-

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

hanes

darganfyddwr neu ddyfeisiwrC.F. Aver von Welsbach
man darganfodAustria
dyddiad darganfod1885
geirdarddiadGreek: prasios and didymos (green twin); from its green salts.
ynganiadpra-si-eh-DIM-i-em (Saesneg)

source

Abundance
Abundance in Earth's crust
9.2 mg/kg
natural abundance (cefnfor)
0.00000064 mg/L
natural abundance (corff dynol)
natural abundance (Awyrfaen)
0.0000098 %
natural abundance (Haul)
0.0000001 %
Abundance in Universe
0.0000002 %

Nuclear Screening Constants

1s1.1694
2p4.2306
2s15.538
3d13.8476
3p19.1756
3s19.499
4d32.7028
4f37.8992
4p29.9432
4s28.6668
5p43.7165
5s41.387
6s51.2534