Praseodimi (Pr)

element with the atomic number of 59

Atomic Number	59
Atomic Weight	140.90766
mass number	141

Group
Period	6
Block	f

protoni	59 p⁺
nyutroni	82 n⁰
elektroni	59 e^-

Physical Property

Atomic Radius	185 pm 286 pm
molar volume	20.8 cm³/mol
Covalent Radius	176 pm 138 pm 128 pm 203 pm
Metallic Radius
ionic radius	99 pm 112.6 pm 117.9 pm 85 pm 96 pm
Crystal Radius	113 pm 126.6 pm 131.9 pm 99 pm 110 pm
Van der Waals radius	240 pm 273 pm 360.6 pm
msongamano	6.773 g/cm³ 6,500 kg/m³

Chemical Property

nishati

proton affinity
electron affinity	0.962 eV/particle
ionization energy	5.473 eV/particle 10.55 eV/particle 21.6237 eV/particle 38.98 eV/particle 57.5 eV/particle 82 eV/particle 97 eV/particle 112 eV/particle 131 eV/particle 148 eV/particle 162 eV/particle 196 eV/particle 217.02 eV/particle 350 eV/particle 378 eV/particle 412 eV/particle 445 eV/particle 478 eV/particle 516 eV/particle 554 eV/particle 590 eV/particle 627 eV/particle 663 eV/particle 803 eV/particle 840 eV/particle 880 eV/particle 920 eV/particle 985 eV/particle 1,028 eV/particle 1,124 eV/particle 1,169.94 eV/particle 2,019 eV/particle 2,108 eV/particle 2,202 eV/particle 2,304 eV/particle 2,400 eV/particle 2,501 eV/particle 2,628 eV/particle 2,729 eV/particle 2,838 eV/particle 2,941 eV/particle 3,227 eV/particle 3,319 eV/particle 3,419 eV/particle 3,512 eV/particle 3,729 eV/particle 3,832 eV/particle 4,030 eV/particle 4,130 eV/particle 9,378 eV/particle 9,632 eV/particle 9,913 eV/particle 10,175 eV/particle 10,959 eV/particle 11,262 eV/particle 11,641 eV/particle 11,895.89 eV/particle 48,571.71 eV/particle 49,722.2 eV/particle

enthalpy of vaporization	331 kJ/mol
enthalpy of fusion	11.3 kJ/mol
standard enthalpy of formation	356.9 kJ/mol
elektroni

Mzingo elektroni	2, 8, 18, 21, 8, 2

valence electron	2 ⓘ

electron configuration	[Xe] 4f³ 6s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f³ 6s²

oxidation number	0, 1, 2, 3, 4, 5
electronegativity	0.17208 1.13
Electrophilicity Index	1.1474513688760803 eV/particle
fundamental state of matter

phase of matter	Solid
gaseous state of matter
Boiling Point	3,793.15 K
Melting Point	1,204.15 K
critical pressure
critical temperature
Kiwango utatu
appearance
Rangi	Silver #ff1493 #d9ffc7 #d9ffc7
appearance	grayish white
refractive index
thermodynamic material property
Thermal Conductivity	12.5 W/(m K)
thermal expansion	0.0000067 1/K
molar heat capacity	27.2 J/(mol K)
Specific Heat Capacity	0.193 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	1.4 MS/m
electrical resistivity	0.0000007 m Ω
superconductivity
Uga sumaku
type	paramagnetic
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
structure
Crystal Structure	Simple Hexagonal (HEX)
lattice constant	3.67 Å
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness	481 MPa 400 MPa
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
Category	Lanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number	30
Mendeleev Number	17
Pettifor Number	31
Geochemical Class	rare earth & related
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	216 ± 20 a₀
C6 Dispersion Coefficient	3,760 a₀
allotrope
Neutron cross section	11.4
Neutron Mass Absorption	0.0029
quantum number	4I9/2
space group	194 (P63/mmc)

Isotopes of Praseodymium

Stable Isotopes	1
Unstable Isotopes	40
Natural Isotopes	1

¹²¹Pr

mass number	121
neutron number	62
relative atomic mass	120.955393 ± 0.000537 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	12 ± 5 ms
spin	3/2
nuclear quadrupole moment
Uvumbuzi	2005
parity

hali ya kuoza	intensity
p (proton emission)	100%

¹²²Pr

mass number	122
neutron number	63
relative atomic mass	121.951927 ± 0.000537 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha
spin
nuclear quadrupole moment
Uvumbuzi
parity

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

¹²³Pr

mass number	123
neutron number	64
relative atomic mass	122.946076 ± 0.000429 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha
spin	3/2
nuclear quadrupole moment
Uvumbuzi
parity	+

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

¹²⁴Pr

mass number	124
neutron number	65
relative atomic mass	123.94294 ± 0.00043 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.2 ± 0.2 s
spin
nuclear quadrupole moment
Uvumbuzi	1986
parity

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

¹²⁵Pr

mass number	125
neutron number	66
relative atomic mass	124.937659 ± 0.000322 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.3 ± 0.7 s
spin	3/2
nuclear quadrupole moment
Uvumbuzi	2002
parity	+

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

¹²⁶Pr

mass number	126
neutron number	67
relative atomic mass	125.93524 ± 0.00021 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.12 ± 0.18 s
spin	4
nuclear quadrupole moment
Uvumbuzi	1983
parity

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

¹²⁷Pr

mass number	127
neutron number	68
relative atomic mass	126.93071 ± 0.00021 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	4.2 ± 0.3 s
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1995
parity	+

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

¹²⁸Pr

mass number	128
neutron number	69
relative atomic mass	127.928791 ± 0.000032 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	2.85 ± 0.09 s
spin	3
nuclear quadrupole moment
Uvumbuzi	1985
parity	+

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

¹²⁹Pr

mass number	129
neutron number	70
relative atomic mass	128.925095 ± 0.000032 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	30 ± 4 s
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1977
parity	+

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

¹³⁰Pr

mass number	130
neutron number	71
relative atomic mass	129.92359 ± 0.000069 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	40 ± 0.4 s
spin	6
nuclear quadrupole moment
Uvumbuzi	1977
parity

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

¹³¹Pr

mass number	131
neutron number	72
relative atomic mass	130.92023496 ± 0.000050451 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.5 ± 0.03 m
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1977
parity	+

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

¹³²Pr

mass number	132
neutron number	73
relative atomic mass	131.91924 ± 0.000031 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.49 ± 0.11 m
spin	2
nuclear quadrupole moment
Uvumbuzi	1974
parity	+

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

¹³³Pr

mass number	133
neutron number	74
relative atomic mass	132.916330558 ± 0.000013416 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	6.5 ± 0.3 m
spin	5/2
nuclear quadrupole moment
Uvumbuzi	1970
parity	+

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

¹³⁴Pr

mass number	134
neutron number	75
relative atomic mass	133.915696729 ± 0.00002181 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	17 ± 2 m
spin	2
nuclear quadrupole moment
Uvumbuzi	1967
parity	-

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

¹³⁵Pr

mass number	135
neutron number	76
relative atomic mass	134.913111772 ± 0.000012686 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	24 ± 1 m
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1954
parity	+

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

¹³⁶Pr

mass number	136
neutron number	77
relative atomic mass	135.91267747 ± 0.000012296 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	13.1 ± 0.1 m
spin	2
nuclear quadrupole moment
Uvumbuzi	1968
parity	+

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

¹³⁷Pr

mass number	137
neutron number	78
relative atomic mass	136.910679183 ± 0.000008733 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.28 ± 0.03 h
spin	5/2
nuclear quadrupole moment
Uvumbuzi	1958
parity	+

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

¹³⁸Pr

mass number	138
neutron number	79
relative atomic mass	137.910757495 ± 0.000010748 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.45 ± 0.05 m
spin	1
nuclear quadrupole moment
Uvumbuzi	1951
parity	+

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

¹³⁹Pr

mass number	139
neutron number	80
relative atomic mass	138.9089327 ± 0.000003917 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	4.41 ± 0.04 h
spin	5/2
nuclear quadrupole moment
Uvumbuzi	1951
parity	+

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

¹⁴⁰Pr

mass number	140
neutron number	81
relative atomic mass	139.9090856 ± 0.000006593 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.39 ± 0.01 m
spin	1
nuclear quadrupole moment
Uvumbuzi	1938
parity	+

hali ya kuoza	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
e⁺ (positron emission)	48.7%
ϵ (electron capture)	51.3%

¹⁴¹Pr

mass number	141
neutron number	82
relative atomic mass	140.907659604 ± 0.000001607 Da
g-factor	1.7064 ± 0.0012
natural abundance	100
Unururifu	stable isotope
Nusumaisha	Not Radioactive ☢️
spin	5/2
nuclear quadrupole moment	-0.077 ± 0.006
Uvumbuzi	1924
parity	+

¹⁴²Pr

mass number	142
neutron number	83
relative atomic mass	141.91005164 ± 0.000001607 Da
g-factor	0.117 ± 0.0005
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	19.12 ± 0.04 h
spin	2
nuclear quadrupole moment	0.039 ± 0.017
Uvumbuzi	1935
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
ϵ (electron capture)	0.0164%

¹⁴³Pr

mass number	143
neutron number	84
relative atomic mass	142.910822624 ± 0.000001949 Da
g-factor	0.77 ± 0.0014285714285714
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	13.57 ± 0.02 d
spin	7/2
nuclear quadrupole moment	0.77 ± 0.16
Uvumbuzi	1948
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁴⁴Pr

mass number	144
neutron number	85
relative atomic mass	143.913310682 ± 0.000002907 Da
g-factor	0
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	17.28 ± 0.05 m
spin	0
nuclear quadrupole moment	0
Uvumbuzi	1951
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁴⁵Pr

mass number	145
neutron number	86
relative atomic mass	144.914517987 ± 0.000007674 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	5.984 ± 0.01 h
spin	7/2
nuclear quadrupole moment
Uvumbuzi	1954
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁴⁶Pr

mass number	146
neutron number	87
relative atomic mass	145.91768763 ± 0.000036882 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	24.09 ± 0.1 m
spin	2
nuclear quadrupole moment
Uvumbuzi	1953
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁴⁷Pr

mass number	147
neutron number	88
relative atomic mass	146.919007438 ± 0.00001702 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	13.39 ± 0.04 m
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1964
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁴⁸Pr

mass number	148
neutron number	89
relative atomic mass	147.922129992 ± 0.000016147 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	2.29 ± 0.02 m
spin	1
nuclear quadrupole moment
Uvumbuzi	1964
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁴⁹Pr

mass number	149
neutron number	90
relative atomic mass	148.9237361 ± 0.0000106 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	2.26 ± 0.07 m
spin	5/2
nuclear quadrupole moment
Uvumbuzi	1964
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁵⁰Pr

mass number	150
neutron number	91
relative atomic mass	149.926676391 ± 0.000009677 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	6.19 ± 0.16 s
spin	1
nuclear quadrupole moment
Uvumbuzi	1970
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁵¹Pr

mass number	151
neutron number	92
relative atomic mass	150.928309066 ± 0.000012506 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	18.9 ± 0.07 s
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1990
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁵²Pr

mass number	152
neutron number	93
relative atomic mass	151.9315529 ± 0.0000199 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	3.57 ± 0.11 s
spin	4
nuclear quadrupole moment
Uvumbuzi	1983
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%

¹⁵³Pr

mass number	153
neutron number	94
relative atomic mass	152.933903511 ± 0.000012755 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	4.28 ± 0.11 s
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1987
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁵⁴Pr

mass number	154
neutron number	95
relative atomic mass	153.937885165 ± 0.00010736 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	2.3 ± 0.09 s
spin	3
nuclear quadrupole moment
Uvumbuzi	1988
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁵⁵Pr

mass number	155
neutron number	96
relative atomic mass	154.940509193 ± 0.000018462 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	1.47 ± 0.3 s
spin	3/2
nuclear quadrupole moment
Uvumbuzi	1992
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁵⁶Pr

mass number	156
neutron number	97
relative atomic mass	155.9447669 ± 0.0000011 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	444 ± 6 ms
spin	1
nuclear quadrupole moment
Uvumbuzi	1992
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁵⁷Pr

mass number	157
neutron number	98
relative atomic mass	156.9480031 ± 0.0000034 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	307 ± 21 ms
spin	3/2
nuclear quadrupole moment
Uvumbuzi	2017
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁵⁸Pr

mass number	158
neutron number	99
relative atomic mass	157.952603 ± 0.000322 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	181 ± 14 ms
spin	5
nuclear quadrupole moment
Uvumbuzi	2016
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁵⁹Pr

mass number	159
neutron number	100
relative atomic mass	158.956232 ± 0.000429 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	134 ± 43 ms
spin	3/2
nuclear quadrupole moment
Uvumbuzi	2017
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶⁰Pr

mass number	160
neutron number	101
relative atomic mass	159.961138 ± 0.000429 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha	170 ± 140 ms
spin	1
nuclear quadrupole moment
Uvumbuzi	2017
parity	+

hali ya kuoza	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁶¹Pr

mass number	161
neutron number	102
relative atomic mass	160.965121 ± 0.000537 Da
g-factor
natural abundance
Unururifu	☢️ radioactive element
Nusumaisha
spin	3/2
nuclear quadrupole moment
Uvumbuzi	2018
parity	-

hali ya kuoza	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

historia

mgunduzi au mvumbuzi	C.F. Aver von Welsbach
location of discovery	Austria
Uvumbuzi	1885
Etimolojia	Greek: prasios and didymos (green twin); from its green salts.
pronunciation	pra-si-eh-DIM-i-em (Kiingereza)

source

Abundance
Abundance in Earth's crust	9.2 mg/kg
natural abundance (Bahari)	0.00000064 mg/L
natural abundance (Mwili)
natural abundance (Kimondo)	0.0000098 %
natural abundance (Jua)	0.0000001 %
Abundance in Universe	0.0000002 %

Nuclear Screening Constants

1	s	1.1694
2	p	4.2306
2	s	15.538
3	d	13.8476
3	p	19.1756
3	s	19.499
4	d	32.7028
4	f	37.8992
4	p	29.9432
4	s	28.6668
5	p	43.7165
5	s	41.387
6	s	51.2534

Praseodimi on ChemicalAid

Australian Educational Vocabulary ID	scot/3561
CAS Registry Number	7440-10-0
ChEBI ID	49828
ChemSpider ID	22384
DSSTOX compound identifier	DTXCID2047648
DSSTox substance ID	DTXSID4064684
Den Store Danske ID	praseodym
ECHA Substance Infocard ID	100.028.291
Elhuyar ZTH ID	030065
Encyclopædia Britannica Online ID	science/praseodymium
Encyclopædia Universalis ID	praseodyme
Freebase ID	/m/025sc08
GND	4175591-1
Gran Enciclopèdia Catalana ID	0134006
Great Russian Encyclopedia Online ID	3173701
InChI	InChI=1S/Pr
InChIKey	PUDIUYLPXJFUGB-UHFFFAOYSA-N
KBpedia ID	Praseodymium
Library of Congress authority ID	sh85106095
MeSH descriptor ID	D011221
Namuwiki ID	프라세오디뮴
National Library of Israel J9U ID	987007531660105171
OmegaWiki Defined Meaning	342115
OpenAlex ID	C537997061
PubChem CID	23942
Quora topic ID	Praseodymium
RxNorm ID	1311481
Römpp online ID	RD-16-03954
Store norske leksikon ID	praseodym
Treccani ID	praseodimio
UNII	NKN7EZA750
USGS Thesaurus ID	1545
WordNet 3.1 Synset ID	14675391-n

Praseodimi (Pr)

Physical Property

Chemical Property

other

Isotopes of Praseodymium

121Pr

122Pr

123Pr

124Pr

125Pr

126Pr

127Pr

128Pr

129Pr

130Pr

131Pr

132Pr

133Pr

134Pr

135Pr

136Pr

137Pr

138Pr

139Pr

140Pr

141Pr

142Pr

143Pr

144Pr

145Pr

146Pr

147Pr

148Pr

149Pr

150Pr

151Pr

152Pr

153Pr

154Pr

155Pr

156Pr

157Pr

158Pr

159Pr

160Pr

161Pr

historia

source

Nuclear Screening Constants

¹²¹Pr

¹²²Pr

¹²³Pr

¹²⁴Pr

¹²⁵Pr

¹²⁶Pr

¹²⁷Pr

¹²⁸Pr

¹²⁹Pr

¹³⁰Pr

¹³¹Pr

¹³²Pr

¹³³Pr

¹³⁴Pr

¹³⁵Pr

¹³⁶Pr

¹³⁷Pr

¹³⁸Pr

¹³⁹Pr

¹⁴⁰Pr

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¹⁴⁸Pr

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