Praseodym

Praseodym (Pr)

grundämne
Atomnummer59
Atommassa140.90766
masstal141
Grupp
Period6
Blockf
Protoner59 p+
Neutroner82 n0
Electrons59 e-
Animated Bohrs atommodell of Pr (Praseodym)

Egenskaper

fysisk egenskap
atomradie
185 pm
molvolym
kovalent radie
176 pm
Metallic Radius
ionic radius
99 pm
Crystal Radius
113 pm
Van der Waalsradie
240 pm
densitet
6,773 g/cm³
energi
proton affinity
Elektronaffinitet
joniseringsenergi
joniseringsenergi of Pr (Praseodym)
ångbildningsvärme
331 kJ/mol
smältvärme
11,3 kJ/mol
Bildningsentalpi
356,9 kJ/mol
Electrons
electron shell2, 8, 18, 21, 8, 2
Bohrs atommodell: Pr (Praseodym)
valenselektron2
Elektronformel: Pr (Praseodym)
elektronkonfiguration[Xe] 4f3 6s2
Enhanced Bohrs atommodell of Pr (Praseodym)
Orbital Diagram of Pr (Praseodym)
oxidationstal0, 1, 2, 3, 4, 5
elektronegativitet
1.13
Electrophilicity
1,1474513688760803 eV/particle
Phases
aggregationstillståndFast
Gas Phase
Kokpunkt
3 793,15 K
Smältpunkt
1 204,15 K
critical pressure
critical temperature
trippelpunkt
Visual
färg
Silver
appearancegrayish white
Brytningsindex
materialegenskap
Värmeledningsförmåga
12,5 W/(m K)
termisk expansion
0,0000067 1/K
molar heat capacity
Specifik värmekapacitet
0,193 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
elektrisk konduktivitet
1,4 MS/m
resistivitet
0,0000007 m Ω
supraledare
magnetism
typeparamagnetic
magnetisk susceptibilitet (Mass)
0,000000423 m³/Kg
magnetisk susceptibilitet (Molar)
0,000000059604 m³/mol
magnetisk susceptibilitet (Volume)
0,0028087
magnetic ordering
Curiepunkten
Néel temperature
Structure
KristallstrukturEnkelt hexagonalt (HEX)
Gitterkonstant
3,67 Å
Lattice Anglesπ/2, π/2, 2 π/3
mekanisk materialegenskap
hårdhet
Kompressibilitet
29 GPa
skjuvmodul
15 GPa
Young's modulus
37 GPa
Poissons konstant
0,28
ljudhastighet
2 280 m/s
klassificering
KategoriLantanoider, Lanthanides
CAS Group
IUPAC Group
Glawe Number30
Mendeleev Number17
Pettifor Number31
Geochemical Classrare earth & related
Goldschmidt classificationlitophile
övrigt
Gas Basicity
Dipole Polarizability
216 ± 20 a₀
C6 Dispersion Coefficient
Allotropes
Träffyta
11,4
Neutron Mass Absorption
0,0029
kvanttal4I9/2
rymdgrupp194 (P63/mmc)

Praseodymisotoper

Stabila isotoper1
Instabila isotoper40
Radioactive Isotopes40

121Pr

natural abundanceRadioactive ☢️
relative atomic mass
120,955393 ± 0,000537 Da
masstal121
g-factor
Halveringstid
12 ± 5 ms
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2005
Paritet

121Pr Decay Modes
decay modeIntensitet
p (proton emission)100%

122Pr

natural abundanceRadioactive ☢️
relative atomic mass
121,951927 ± 0,000537 Da
masstal122
g-factor
Halveringstid
Spinn
nuclear quadrupole moment
upptäcktsdatum
Paritet

122Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
β+ p (β+-delayed proton emission)%

123Pr

natural abundanceRadioactive ☢️
relative atomic mass
122,946076 ± 0,000429 Da
masstal123
g-factor
Halveringstid
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum
Paritet+

123Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)%
β+ p (β+-delayed proton emission)%

124Pr

natural abundanceRadioactive ☢️
relative atomic mass
123,94294 ± 0,00043 Da
masstal124
g-factor
Halveringstid
1,2 ± 0,2 s
Spinn
nuclear quadrupole moment
upptäcktsdatum1986
Paritet

124Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)%

125Pr

natural abundanceRadioactive ☢️
relative atomic mass
124,937659 ± 0,000322 Da
masstal125
g-factor
Halveringstid
3,3 ± 0,7 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2002
Paritet+

125Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)%

126Pr

natural abundanceRadioactive ☢️
relative atomic mass
125,93524 ± 0,00021 Da
masstal126
g-factor
Halveringstid
3,12 ± 0,18 s
Spinn4
nuclear quadrupole moment
upptäcktsdatum1983
Paritet

126Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)%

127Pr

natural abundanceRadioactive ☢️
relative atomic mass
126,93071 ± 0,00021 Da
masstal127
g-factor
Halveringstid
4,2 ± 0,3 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1995
Paritet+

127Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

128Pr

natural abundanceRadioactive ☢️
relative atomic mass
127,928791 ± 0,000032 Da
masstal128
g-factor
Halveringstid
2,85 ± 0,09 s
Spinn3
nuclear quadrupole moment
upptäcktsdatum1985
Paritet+

128Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)%

129Pr

natural abundanceRadioactive ☢️
relative atomic mass
128,925095 ± 0,000032 Da
masstal129
g-factor
Halveringstid
30 ± 4 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1977
Paritet+

129Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

130Pr

natural abundanceRadioactive ☢️
relative atomic mass
129,92359 ± 0,000069 Da
masstal130
g-factor
Halveringstid
40 ± 0,4 s
Spinn6
nuclear quadrupole moment
upptäcktsdatum1977
Paritet

130Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

131Pr

natural abundanceRadioactive ☢️
relative atomic mass
130,92023496 ± 0,000050451 Da
masstal131
g-factor
Halveringstid
1,5 ± 0,03 m
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1977
Paritet+

131Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

132Pr

natural abundanceRadioactive ☢️
relative atomic mass
131,91924 ± 0,000031 Da
masstal132
g-factor
Halveringstid
1,49 ± 0,11 m
Spinn2
nuclear quadrupole moment
upptäcktsdatum1974
Paritet+

132Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

133Pr

natural abundanceRadioactive ☢️
relative atomic mass
132,916330558 ± 0,000013416 Da
masstal133
g-factor
Halveringstid
6,5 ± 0,3 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1970
Paritet+

133Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

134Pr

natural abundanceRadioactive ☢️
relative atomic mass
133,915696729 ± 0,00002181 Da
masstal134
g-factor
Halveringstid
17 ± 2 m
Spinn2
nuclear quadrupole moment
upptäcktsdatum1967
Paritet-

134Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

135Pr

natural abundanceRadioactive ☢️
relative atomic mass
134,913111772 ± 0,000012686 Da
masstal135
g-factor
Halveringstid
24 ± 1 m
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet+

135Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

136Pr

natural abundanceRadioactive ☢️
relative atomic mass
135,91267747 ± 0,000012296 Da
masstal136
g-factor
Halveringstid
13,1 ± 0,1 m
Spinn2
nuclear quadrupole moment
upptäcktsdatum1968
Paritet+

136Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

137Pr

natural abundanceRadioactive ☢️
relative atomic mass
136,910679183 ± 0,000008733 Da
masstal137
g-factor
Halveringstid
1,28 ± 0,03 h
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1958
Paritet+

137Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

138Pr

natural abundanceRadioactive ☢️
relative atomic mass
137,910757495 ± 0,000010748 Da
masstal138
g-factor
Halveringstid
1,45 ± 0,05 m
Spinn1
nuclear quadrupole moment
upptäcktsdatum1951
Paritet+

138Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

139Pr

natural abundanceRadioactive ☢️
relative atomic mass
138,9089327 ± 0,000003917 Da
masstal139
g-factor
Halveringstid
4,41 ± 0,04 h
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1951
Paritet+

139Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%

140Pr

natural abundanceRadioactive ☢️
relative atomic mass
139,9090856 ± 0,000006593 Da
masstal140
g-factor
Halveringstid
3,39 ± 0,01 m
Spinn1
nuclear quadrupole moment
upptäcktsdatum1938
Paritet+

140Pr Decay Modes
decay modeIntensitet
β+ (β+ decay; β+ = ϵ + e+)100%
e+ (positron emission)48.7%
ϵ (electron capture)51.3%

141Pr

natural abundance
100
relative atomic mass
140,907659604 ± 0,000001607 Da
masstal141
g-factor
1,7064 ± 0,0012
Halveringstid
Spinn5/2
nuclear quadrupole moment
−0,077 ± 0,006
upptäcktsdatum1924
Paritet+

142Pr

natural abundanceRadioactive ☢️
relative atomic mass
141,91005164 ± 0,000001607 Da
masstal142
g-factor
0,117 ± 0,0005
Halveringstid
19,12 ± 0,04 h
Spinn2
nuclear quadrupole moment
0,039 ± 0,017
upptäcktsdatum1935
Paritet-

142Pr Decay Modes
decay modeIntensitet
β (β decay)100%
ϵ (electron capture)0.0164%

143Pr

natural abundanceRadioactive ☢️
relative atomic mass
142,910822624 ± 0,000001949 Da
masstal143
g-factor
0,77 ± 0,0014285714285714
Halveringstid
13,57 ± 0,02 d
Spinn7/2
nuclear quadrupole moment
0,77 ± 0,16
upptäcktsdatum1948
Paritet+

143Pr Decay Modes
decay modeIntensitet
β (β decay)100%

144Pr

natural abundanceRadioactive ☢️
relative atomic mass
143,913310682 ± 0,000002907 Da
masstal144
g-factor
0
Halveringstid
17,28 ± 0,05 m
Spinn0
nuclear quadrupole moment
0
upptäcktsdatum1951
Paritet-

144Pr Decay Modes
decay modeIntensitet
β (β decay)100%

145Pr

natural abundanceRadioactive ☢️
relative atomic mass
144,914517987 ± 0,000007674 Da
masstal145
g-factor
Halveringstid
5,984 ± 0,01 h
Spinn7/2
nuclear quadrupole moment
upptäcktsdatum1954
Paritet+

145Pr Decay Modes
decay modeIntensitet
β (β decay)100%

146Pr

natural abundanceRadioactive ☢️
relative atomic mass
145,91768763 ± 0,000036882 Da
masstal146
g-factor
Halveringstid
24,09 ± 0,1 m
Spinn2
nuclear quadrupole moment
upptäcktsdatum1953
Paritet-

146Pr Decay Modes
decay modeIntensitet
β (β decay)100%

147Pr

natural abundanceRadioactive ☢️
relative atomic mass
146,919007438 ± 0,00001702 Da
masstal147
g-factor
Halveringstid
13,39 ± 0,04 m
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1964
Paritet+

147Pr Decay Modes
decay modeIntensitet
β (β decay)100%

148Pr

natural abundanceRadioactive ☢️
relative atomic mass
147,922129992 ± 0,000016147 Da
masstal148
g-factor
Halveringstid
2,29 ± 0,02 m
Spinn1
nuclear quadrupole moment
upptäcktsdatum1964
Paritet-

148Pr Decay Modes
decay modeIntensitet
β (β decay)100%

149Pr

natural abundanceRadioactive ☢️
relative atomic mass
148,9237361 ± 0,0000106 Da
masstal149
g-factor
Halveringstid
2,26 ± 0,07 m
Spinn5/2
nuclear quadrupole moment
upptäcktsdatum1964
Paritet+

149Pr Decay Modes
decay modeIntensitet
β (β decay)100%

150Pr

natural abundanceRadioactive ☢️
relative atomic mass
149,926676391 ± 0,000009677 Da
masstal150
g-factor
Halveringstid
6,19 ± 0,16 s
Spinn1
nuclear quadrupole moment
upptäcktsdatum1970
Paritet-

150Pr Decay Modes
decay modeIntensitet
β (β decay)100%

151Pr

natural abundanceRadioactive ☢️
relative atomic mass
150,928309066 ± 0,000012506 Da
masstal151
g-factor
Halveringstid
18,9 ± 0,07 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1990
Paritet-

151Pr Decay Modes
decay modeIntensitet
β (β decay)100%

152Pr

natural abundanceRadioactive ☢️
relative atomic mass
151,9315529 ± 0,0000199 Da
masstal152
g-factor
Halveringstid
3,57 ± 0,11 s
Spinn4
nuclear quadrupole moment
upptäcktsdatum1983
Paritet+

152Pr Decay Modes
decay modeIntensitet
β (β decay)100%

153Pr

natural abundanceRadioactive ☢️
relative atomic mass
152,933903511 ± 0,000012755 Da
masstal153
g-factor
Halveringstid
4,28 ± 0,11 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1987
Paritet-

153Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

154Pr

natural abundanceRadioactive ☢️
relative atomic mass
153,937885165 ± 0,00010736 Da
masstal154
g-factor
Halveringstid
2,3 ± 0,09 s
Spinn3
nuclear quadrupole moment
upptäcktsdatum1988
Paritet+

154Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

155Pr

natural abundanceRadioactive ☢️
relative atomic mass
154,940509193 ± 0,000018462 Da
masstal155
g-factor
Halveringstid
1,47 ± 0,3 s
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum1992
Paritet-

155Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

156Pr

natural abundanceRadioactive ☢️
relative atomic mass
155,9447669 ± 0,0000011 Da
masstal156
g-factor
Halveringstid
444 ± 6 ms
Spinn1
nuclear quadrupole moment
upptäcktsdatum1992
Paritet+

156Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

157Pr

natural abundanceRadioactive ☢️
relative atomic mass
156,9480031 ± 0,0000034 Da
masstal157
g-factor
Halveringstid
307 ± 21 ms
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2017
Paritet-

157Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

158Pr

natural abundanceRadioactive ☢️
relative atomic mass
157,952603 ± 0,000322 Da
masstal158
g-factor
Halveringstid
181 ± 14 ms
Spinn5
nuclear quadrupole moment
upptäcktsdatum2016
Paritet-

158Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

159Pr

natural abundanceRadioactive ☢️
relative atomic mass
158,956232 ± 0,000429 Da
masstal159
g-factor
Halveringstid
134 ± 43 ms
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2017
Paritet-

159Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

160Pr

natural abundanceRadioactive ☢️
relative atomic mass
159,961138 ± 0,000429 Da
masstal160
g-factor
Halveringstid
170 ± 140 ms
Spinn1
nuclear quadrupole moment
upptäcktsdatum2017
Paritet+

160Pr Decay Modes
decay modeIntensitet
β (β decay)100%
β n (β-delayed neutron emission)%

161Pr

natural abundanceRadioactive ☢️
relative atomic mass
160,965121 ± 0,000537 Da
masstal161
g-factor
Halveringstid
Spinn3/2
nuclear quadrupole moment
upptäcktsdatum2018
Paritet-

161Pr Decay Modes
decay modeIntensitet
β (β decay)%
β n (β-delayed neutron emission)%
Praseodym 1

historia

upptäckare eller uppfinnareC.F. Aver von Welsbach
fyndplatsAustria
upptäcktsdatum1885
etymologiGreek: prasios and didymos (green twin); from its green salts.
uttalpra-si-eh-DIM-i-em (engelska)

Sources

Förekomst
Abundance in Earth's crust
9,2 mg/kg
Abundance in Oceans
0,00000064 mg/L
Abundance in Human Body
Abundance in Meteor
0,0000098 %
Abundance in Sun
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