Promethium (Pm)

Soft silvery metallic element, belongs to the lanthanoids. Pm-147, the only natural isotope, is radioactive and has a half-life of 252 years. Eighteen radioisotopes have been produced, but all have very short half-lives. Found only in nuclear decay waste. Pm-147 is of interest as a beta-decay source, however Pm-146 and Pm-148 have to be removed from it first, as they generate gamma radiation. Discovered by J.A. Marinsky, L.E. Glendenin and C.D. Coryell in 1947.

Atomic Number	61
Atomic Weight	144.91276
Mass Number	126

Group
Period	6
Block	f

Protons	61 p⁺
Neutrons	65 n⁰
Electrons	61 e^-

Properties

Energy
Atomic Radius	185 pm 283 pm
Molar Volume
Covalent Radius	173 pm 135 pm 199 pm
Metallic Radius
Ionic Radius	97 pm 109.3 pm 114.4 pm
Crystal Radius	111 pm 123.3 pm 128.4 pm
Van der Waals Radius	238 pm 272 pm 354.7 pm
Density	7.26 g/cm³
Proton Affinity
Electron Affinity
Ionization Energy	5.582 eV/particle 10.9 eV/particle 22 eV/particle 41 eV/particle 61.69 eV/particle 85 eV/particle 101 eV/particle 116 eV/particle 138 eV/particle 155 eV/particle 174 eV/particle 202 eV/particle 229 eV/particle 200 eV/particle 269 eV/particle 430 eV/particle 462 eV/particle 497 eV/particle 534 eV/particle 569 eV/particle 609 eV/particle 651 eV/particle 689 eV/particle 730 eV/particle 767 eV/particle 916 eV/particle 956 eV/particle 998 eV/particle 1,040 eV/particle 1,113 eV/particle 1,158 eV/particle 1,261 eV/particle 1,308.7 eV/particle 2,251 eV/particle 2,344 eV/particle 2,443 eV/particle 2,549 eV/particle 2,652 eV/particle 2,755 eV/particle 2,892 eV/particle 2,997 eV/particle 3,110 eV/particle 3,219 eV/particle 3,519 eV/particle 3,613 eV/particle 3,718 eV/particle 3,816 eV/particle 4,056 eV/particle 4,166 eV/particle 4,371 eV/particle 4,476 eV/particle 10,115 eV/particle 10,378 eV/particle 10,671 eV/particle 10,942 eV/particle 11,819 eV/particle 12,136 eV/particle 12,532 eV/particle 12,797.26 eV/particle 52,144.29 eV/particle 53,346.1 eV/particle

Heat of Vaporization
Heat of Fusion
Heat of Formation
Electrons
Electron Shells	2, 8, 18, 23, 8, 2

Valence Electrons	2

Electron Configuration	[Xe] 4f⁵ 6s²

Oxidation States	2, 3
Electronegativity	0.1810032
Electrophilicity
Phases
Phase	Solid
Gas Phase
Boiling Point
Melting Point	1,315.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Color	Silver #ff1493 #a3ffc7 #a3ffc7
Appearance	metallic
Refractive Index
Thermodynamic Properties
Thermal Conductivity	17.9 W/(m K)
Thermal Expansion	0.000011 1/K
Molar Heat Capacity
Specific Heat Capacity
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type	Conductor
Electrical Conductivity	1.3 MS/m
Electrical Resistivity	0.00000075 m Ω
Superconducting Point
Magnetism
Type
Magnetic Susceptibility (Mass)
Magnetic Susceptibility (Molar)
Magnetic Susceptibility (Volume)
Magnetic Ordering
Curie Point
Neel Point
Structure
Crystal Structure	()
Lattice Constant
Lattice Angles
Mechanical Properties
Hardness
Bulk Modulus	33 GPa
Shear Modulus	18 GPa
Young Modulus	46 GPa
Poisson Ratio	0.28
Speed of Sound
Classification
Category	Lanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number	28
Mendeleev Number	21
Pettifor Number	29
Geochemical Class	rare earth & related
Goldschmidt Class	litophile
Other
Gas Basicity
Dipole Polarizability	200 ± 20 a₀
C6 Dispersion Coefficient	3,340 a₀
Allotropes
Neutron Cross Section	8,400
Neutron Mass Absorption
Quantum Numbers	6H5/2
Space Group	()

Isotopes of Promethium

Stable Isotopes	0
Unstable Isotopes	40
Radioactive Isotopes	40

¹²⁶Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	125.957327 ± 0.000537 Da
Mass Number	126
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

¹²⁶Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
β⁺ p (β⁺-delayed proton emission)	%

¹²⁷Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	126.951358 ± 0.000429 Da
Mass Number	127
G-Factor
Half Life
Spin	3/2
Quadrupole Moment
Discovery Year
Parity	+

¹²⁷Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
p (proton emission)	%

¹²⁸Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	127.948234 ± 0.000322 Da
Mass Number	128
G-Factor
Half Life	1 ± 0.3 s
Spin	4
Quadrupole Moment
Discovery Year	1999
Parity	+

¹²⁸Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	%
p (proton emission)	0%

¹²⁹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	128.942909 ± 0.000322 Da
Mass Number	129
G-Factor
Half Life	2.4 ± 0.9 s
Spin	5/2
Quadrupole Moment
Discovery Year	2004
Parity	+

¹²⁹Pm Decay Modes

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

¹³⁰Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	129.940451 ± 0.000215 Da
Mass Number	130
G-Factor
Half Life	2.6 ± 0.2 s
Spin	5
Quadrupole Moment
Discovery Year	1985
Parity	+

¹³⁰Pm Decay Modes

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

¹³¹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	130.935834 ± 0.000215 Da
Mass Number	131
G-Factor
Half Life	6.3 ± 0.8 s
Spin	11/2
Quadrupole Moment
Discovery Year	1998
Parity	-

¹³¹Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³²Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	131.93384 ± 0.00016 Da
Mass Number	132
G-Factor
Half Life	6.2 ± 0.6 s
Spin	3
Quadrupole Moment
Discovery Year	1977
Parity	+

¹³²Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	5%

¹³³Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	132.929782 ± 0.000054 Da
Mass Number	133
G-Factor
Half Life	13.5 ± 2.1 s
Spin	3/2
Quadrupole Moment
Discovery Year	1977
Parity	+

¹³³Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁴Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	133.928326 ± 0.000045 Da
Mass Number	134
G-Factor
Half Life	22 ± 1 s
Spin	5
Quadrupole Moment
Discovery Year	1977
Parity	+

¹³⁴Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁵Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	134.924785 ± 0.000089 Da
Mass Number	135
G-Factor
Half Life	49 ± 3 s
Spin	3/2
Quadrupole Moment
Discovery Year	1975
Parity	+

¹³⁵Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁶Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	135.923595949 ± 0.000074152 Da
Mass Number	136
G-Factor
Half Life	107 ± 6 s
Spin	7
Quadrupole Moment
Discovery Year	1988
Parity	+

¹³⁶Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁷Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	136.920479519 ± 0.000014 Da
Mass Number	137
G-Factor
Half Life
Spin	5/2
Quadrupole Moment
Discovery Year	1975
Parity	-

¹³⁷Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

¹³⁸Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	137.919576119 ± 0.000012456 Da
Mass Number	138
G-Factor	1.0666666666667 ± 0.3
Half Life	3.24 ± 0.05 m
Spin	3
Quadrupole Moment
Discovery Year	1973
Parity	-

¹³⁸Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	138.916799228 ± 0.000014587 Da
Mass Number	139
G-Factor
Half Life	4.15 ± 0.05 m
Spin	5/2
Quadrupole Moment
Discovery Year	1967
Parity

¹³⁹Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴⁰Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	139.916035918 ± 0.000026001 Da
Mass Number	140
G-Factor
Half Life	9.2 ± 0.2 s
Spin	1
Quadrupole Moment
Discovery Year	1966
Parity	+

¹⁴⁰Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴¹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	140.913555081 ± 0.000015 Da
Mass Number	141
G-Factor
Half Life	20.9 ± 0.05 m
Spin	5/2
Quadrupole Moment
Discovery Year	1952
Parity	+

¹⁴¹Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁴²Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	141.912890982 ± 0.00002533 Da
Mass Number	142
G-Factor
Half Life	40.5 ± 0.5 s
Spin	1
Quadrupole Moment
Discovery Year	1959
Parity	+

¹⁴²Pm Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
e⁺ (positron emission)	77.1%
ϵ (electron capture)	22.9%

¹⁴³Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	142.910938068 ± 0.00000316 Da
Mass Number	143
G-Factor	1.52 ± 0.2
Half Life	265 ± 7 d
Spin	5/2
Quadrupole Moment
Discovery Year	1952
Parity	+

¹⁴³Pm Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%
e⁺ (positron emission)	5.7%

¹⁴⁴Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	143.912596208 ± 0.000003126 Da
Mass Number	144
G-Factor	0.338 ± 0.028
Half Life	363 ± 14 d
Spin	5
Quadrupole Moment
Discovery Year	1952
Parity	-

¹⁴⁴Pm Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%
e⁺ (positron emission)	8%

¹⁴⁵Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	144.912755748 ± 0.000003011 Da
Mass Number	145
G-Factor	1.52 ± 0.064
Half Life	17.7 ± 0.4 y
Spin	5/2
Quadrupole Moment	0.23 ± 0.08
Discovery Year	1951
Parity	+

¹⁴⁵Pm Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%
α (α emission)	2.8%

¹⁴⁶Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	145.91470224 ± 0.000004589 Da
Mass Number	146
G-Factor
Half Life	5.53 ± 0.05 y
Spin	3
Quadrupole Moment
Discovery Year	1960
Parity	-

¹⁴⁶Pm Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	66%
β⁻ (β⁻ decay)	34%

¹⁴⁷Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	146.915144944 ± 0.000001382 Da
Mass Number	147
G-Factor	0.73714285714286 ± 0.02
Half Life	2.6234 ± 0.0002 y
Spin	7/2
Quadrupole Moment	0.74 ± 0.2
Discovery Year	1947
Parity	+

¹⁴⁷Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁴⁸Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	147.917481091 ± 0.000006108 Da
Mass Number	148
G-Factor	2.1 ± 0.2
Half Life	5.368 ± 0.007 d
Spin	1
Quadrupole Moment	0.2 ± 0.2
Discovery Year	1947
Parity	-

¹⁴⁸Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁴⁹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	148.918341507 ± 0.000002344 Da
Mass Number	149
G-Factor	0.94285714285714 ± 0.14285714285714
Half Life	53.08 ± 0.05 h
Spin	7/2
Quadrupole Moment
Discovery Year	1947
Parity	+

¹⁴⁹Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵⁰Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	149.920990014 ± 0.000021504 Da
Mass Number	150
G-Factor
Half Life	2.698 ± 0.015 h
Spin	1
Quadrupole Moment
Discovery Year	1952
Parity	-

¹⁵⁰Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵¹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	150.921216613 ± 0.000004949 Da
Mass Number	151
G-Factor	0.72 ± 0.08
Half Life	28.4 ± 0.04 h
Spin	5/2
Quadrupole Moment	2.2 ± 0.9
Discovery Year	1952
Parity	+

¹⁵¹Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵²Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	151.923505185 ± 0.000027809 Da
Mass Number	152
G-Factor
Half Life	4.12 ± 0.08 m
Spin	1
Quadrupole Moment
Discovery Year	1958
Parity	+

¹⁵²Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵³Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	152.924156252 ± 0.000009729 Da
Mass Number	153
G-Factor
Half Life	5.25 ± 0.02 m
Spin	5/2
Quadrupole Moment
Discovery Year	1962
Parity	-

¹⁵³Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵⁴Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	153.926712791 ± 0.000026861 Da
Mass Number	154
G-Factor
Half Life	2.68 ± 0.07 m
Spin	4
Quadrupole Moment
Discovery Year	1958
Parity	+

¹⁵⁴Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵⁵Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	154.928136951 ± 0.000005065 Da
Mass Number	155
G-Factor
Half Life	41.5 ± 0.2 s
Spin	5/2
Quadrupole Moment
Discovery Year	1982
Parity	-

¹⁵⁵Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵⁶Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	155.931114059 ± 0.000001275 Da
Mass Number	156
G-Factor
Half Life	27.4 ± 0.5 s
Spin	4
Quadrupole Moment
Discovery Year	1986
Parity	+

¹⁵⁶Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵⁷Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	156.933121298 ± 0.000007521 Da
Mass Number	157
G-Factor
Half Life	10.56 ± 0.1 s
Spin	5/2
Quadrupole Moment
Discovery Year	1987
Parity	-

¹⁵⁷Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵⁸Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	157.936546948 ± 0.000000953 Da
Mass Number	158
G-Factor	0
Half Life	4.8 ± 0.5 s
Spin	0
Quadrupole Moment	0
Discovery Year	1987
Parity	+

¹⁵⁸Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁵⁹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	158.939286409 ± 0.000010777 Da
Mass Number	159
G-Factor
Half Life	1.49 ± 0.13 s
Spin	5/2
Quadrupole Moment
Discovery Year	1998
Parity	-

¹⁵⁹Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁶⁰Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	159.943215272 ± 0.0000022 Da
Mass Number	160
G-Factor
Half Life	725 ± 57 ms
Spin	6
Quadrupole Moment
Discovery Year	2012
Parity	-

¹⁶⁰Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁶¹Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	160.946229837 ± 0.0000097 Da
Mass Number	161
G-Factor
Half Life	1.05 ± 0.15 s
Spin	5/2
Quadrupole Moment
Discovery Year	2012
Parity	-

¹⁶¹Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁶²Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	161.950574 ± 0.000322 Da
Mass Number	162
G-Factor
Half Life	630 ± 180 ms
Spin	2
Quadrupole Moment
Discovery Year	2012
Parity	+

¹⁶²Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁶³Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	162.953881 ± 0.000429 Da
Mass Number	163
G-Factor
Half Life	255 ± 25 ms
Spin	5/2
Quadrupole Moment
Discovery Year	2012
Parity	-

¹⁶³Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁶⁴Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	163.958819 ± 0.000429 Da
Mass Number	164
G-Factor
Half Life
Spin	5
Quadrupole Moment
Discovery Year	2018
Parity	-

¹⁶⁴Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁶⁵Pm

Abundance	Radioactive ☢️
Relative Atomic Mass	164.96278 ± 0.000537 Da
Mass Number	165
G-Factor
Half Life
Spin	5/2
Quadrupole Moment
Discovery Year	2018
Parity	-

¹⁶⁵Pm Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

History

The existence of an element between neodymium and samarium was first predicted by Czech chemist Bohuslav Brauner in 1902. Promethium was first produced and characterized at Oak Ridge National Laboratory in 1945 by Jacob A. Marinsky, Lawrence E. Glendenin and Charles D. Coryell. It was produced by the separation and analysis of the fission products of uranium fuel irradiated in a graphite reactor. Named after the Greek Prometheus, who, according to mythology, stole fire from heaven

Discoverers	J.A. Marinsky, L.E. Glendenin, C.D. Coryell
Discovery Location	United States
Discovery Year	1945
Etymology (Name Origin)	Named for the Greek god, Prometheus.
Pronunciation	pro-MEE-thi-em (English)

Promethium is harmful due to its radioactivity

Promethium is the only lanthanide that has no stable isotopes

Uses

Promethium is also used in atomic batteries for spacecraft and guided missiles. Promethium is also used to measure the thickness of materials by evaluating the amount of radiation from a promethium source that passes through the sample. It has possible future uses in portable X-ray sources, and as auxiliary heat or power sources for space probes and satellites. It has been used as a source of radioactivity for thickness-measuring gages.

Sources

Does not occur naturally. Found among fission products of uranium, thorium, and plutonium.

Abundance
Abundance in Earth's crust
Abundance in Oceans
Abundance in Human Body	0 %
Abundance in Meteor	0 %
Abundance in Sun	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

1	s	1.2042
2	p	4.2562
2	s	16.0296
3	d	13.9018
3	p	19.4461
3	s	19.8154
4	d	33.26
4	f	37.866
4	p	30.3768
4	s	29.3604
5	p	44.586
5	s	42.1645
6	s	51.6046

Promethium on ChemicalAid

Australian Educational Vocabulary ID	scot/3562
CAS Registry Number	7440-12-2
ChEBI ID	33373
ChemSpider ID	22386
DSSTOX compound identifier	DTXCID9027738
DSSTox substance ID	DTXSID4047755
Den Store Danske ID	promethium
ECHA Substance Infocard ID	100.028.292
Encyclopædia Britannica Online ID	science/promethium
Encyclopædia Universalis ID	promethium
Freebase ID	/m/025s7xn
GND ID	4175917-5
Gran Enciclopèdia Catalana ID	0134881
Great Russian Encyclopedia Online ID	3180073
InChI	InChI=1S/Pm
InChIKey	VQMWBBYLQSCNPO-UHFFFAOYSA-N
KBpedia ID	Promethium
Library of Congress authority ID	sh85107404
MeSH descriptor ID	D011399
NALT ID	59783
Namuwiki ID	프로메튬
National Library of Israel J9U ID	987007538888005171
OmegaWiki Defined Meaning	343233
PubChem CID	23944
Quora topic ID	Promethium
Römpp online ID	RD-16-04277
Store norske leksikon ID	promethium
Treccani ID	prometeo_res-d3acb1ea-e1d8-11df-9ef0-d5ce3506d72e
UNII	ZGV62C09KN
WordNet 3.1 Synset ID	14675658-n

Promethium (Pm)

Properties

Isotopes of Promethium

126Pm

126Pm Decay Modes

127Pm

127Pm Decay Modes

128Pm

128Pm Decay Modes

129Pm

129Pm Decay Modes

130Pm

130Pm Decay Modes

131Pm

131Pm Decay Modes

132Pm

132Pm Decay Modes

133Pm

133Pm Decay Modes

134Pm

134Pm Decay Modes

135Pm

135Pm Decay Modes

136Pm

136Pm Decay Modes

137Pm

137Pm Decay Modes

138Pm

138Pm Decay Modes

139Pm

139Pm Decay Modes

140Pm

140Pm Decay Modes

141Pm

141Pm Decay Modes

142Pm

142Pm Decay Modes

143Pm

143Pm Decay Modes

144Pm

144Pm Decay Modes

145Pm

145Pm Decay Modes

146Pm

146Pm Decay Modes

147Pm

147Pm Decay Modes

148Pm

148Pm Decay Modes

149Pm

149Pm Decay Modes

150Pm

150Pm Decay Modes

151Pm

151Pm Decay Modes

152Pm

152Pm Decay Modes

153Pm

153Pm Decay Modes

154Pm

154Pm Decay Modes

155Pm

155Pm Decay Modes

156Pm

156Pm Decay Modes

157Pm

157Pm Decay Modes

158Pm

158Pm Decay Modes

159Pm

159Pm Decay Modes

160Pm

160Pm Decay Modes

161Pm

161Pm Decay Modes

162Pm

162Pm Decay Modes

163Pm

163Pm Decay Modes

164Pm