Promethium (Pm)

Promethium is the 61st element in the periodic table and has a symbol of Pm and atomic number of 61. It has an atomic weight of (144.91276) and a mass number of 126. Promethium has sixty-one protons and sixty-five neutrons in its nucleus, and sixty-one electrons in six shells. It is located in group Lanthanides, period six and block f of the periodic table. 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

Physical Properties
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
Energy
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ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f⁵ 6s²

Oxidation States	2, 3
Electronegativity	0.1810032
Electrophilicity Index
States of Matter
Phase	Solid
Gas Phase
Boiling Point
Melting Point	1,315.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Promethium is a Silver. Pm has a CPK of #ff1493, Jmol of #a3ffc7, and MOLCAS GV of #a3ffc7. The Appearance of Element 61 is metallic.
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
The lattice angles of Promethium is .
Crystal Structure	()
Lattice Constant
Lattice Angles
Mechanical Properties
The Bulk Modulus of Promethium is 33 GPa. The Shear Modulus of Pm is 18 GPa. The Young Modulus of Element 61 is 46 GPa. The Poisson Ratio of Promethium (Pm) is 0.28.
Hardness
Bulk Modulus	33 GPa
Shear Modulus	18 GPa
Young's Modulus	46 GPa
Poisson Ratio	0.28
Speed of Sound
Classification
The Glawe Number of Promethium is 28. The Mendeleev Number of Pm is 21. The Pettifor Number of Element 61 is 29. The Geochemical Class of Promethium (Pm) is rare earth & related. The Goldschmidt Class of Promethium is litophile.
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
The Dipole Polarizability of Promethium is 200 plus or minus 20 a₀. Pm has a C6 Dispersion Coefficient (GB) of 3340 a₀. The Allotropes of Element 61 is . The Neutron Cross Section of Promethium (Pm) is 8400. The Quantum Numbers of Promethium is 6H5/2. The Space Group of Pm is ().
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

Mass Number	126
Neutron Number	65
Relative Atomic Mass	125.957327 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year
Parity

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

¹²⁷Pm

Mass Number	127
Neutron Number	66
Relative Atomic Mass	126.951358 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	3/2
Quadrupole Moment
Discovery Year
Parity	+

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

¹²⁸Pm

Mass Number	128
Neutron Number	67
Relative Atomic Mass	127.948234 ± 0.000322 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	1 ± 0.3 s
Spin	4
Quadrupole Moment
Discovery Year	1999
Parity	+

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

¹²⁹Pm

Mass Number	129
Neutron Number	68
Relative Atomic Mass	128.942909 ± 0.000322 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.4 ± 0.9 s
Spin	5/2
Quadrupole Moment
Discovery Year	2004
Parity	+

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

¹³⁰Pm

Mass Number	130
Neutron Number	69
Relative Atomic Mass	129.940451 ± 0.000215 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.6 ± 0.2 s
Spin	5
Quadrupole Moment
Discovery Year	1985
Parity	+

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

¹³¹Pm

Mass Number	131
Neutron Number	70
Relative Atomic Mass	130.935834 ± 0.000215 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	6.3 ± 0.8 s
Spin	11/2
Quadrupole Moment
Discovery Year	1998
Parity	-

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

¹³²Pm

Mass Number	132
Neutron Number	71
Relative Atomic Mass	131.93384 ± 0.00016 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	6.2 ± 0.6 s
Spin	3
Quadrupole Moment
Discovery Year	1977
Parity	+

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

¹³³Pm

Mass Number	133
Neutron Number	72
Relative Atomic Mass	132.929782 ± 0.000054 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	13.5 ± 2.1 s
Spin	3/2
Quadrupole Moment
Discovery Year	1977
Parity	+

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

¹³⁴Pm

Mass Number	134
Neutron Number	73
Relative Atomic Mass	133.928326 ± 0.000045 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	22 ± 1 s
Spin	5
Quadrupole Moment
Discovery Year	1977
Parity	+

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

¹³⁵Pm

Mass Number	135
Neutron Number	74
Relative Atomic Mass	134.924785 ± 0.000089 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	49 ± 3 s
Spin	3/2
Quadrupole Moment
Discovery Year	1975
Parity	+

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

¹³⁶Pm

Mass Number	136
Neutron Number	75
Relative Atomic Mass	135.923595949 ± 0.000074152 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	107 ± 6 s
Spin	7
Quadrupole Moment
Discovery Year	1988
Parity	+

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

¹³⁷Pm

Mass Number	137
Neutron Number	76
Relative Atomic Mass	136.920479519 ± 0.000014 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	5/2
Quadrupole Moment
Discovery Year	1975
Parity	-

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

¹³⁸Pm

Mass Number	138
Neutron Number	77
Relative Atomic Mass	137.919576119 ± 0.000012456 Da
G-Factor	1.0666666666667 ± 0.3
Abundance
Radioactivity	☢️ Radioactive
Half Life	3.24 ± 0.05 m
Spin	3
Quadrupole Moment
Discovery Year	1973
Parity	-

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

¹³⁹Pm

Mass Number	139
Neutron Number	78
Relative Atomic Mass	138.916799228 ± 0.000014587 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.15 ± 0.05 m
Spin	5/2
Quadrupole Moment
Discovery Year	1967
Parity

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

¹⁴⁰Pm

Mass Number	140
Neutron Number	79
Relative Atomic Mass	139.916035918 ± 0.000026001 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	9.2 ± 0.2 s
Spin	1
Quadrupole Moment
Discovery Year	1966
Parity	+

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

¹⁴¹Pm

Mass Number	141
Neutron Number	80
Relative Atomic Mass	140.913555081 ± 0.000015 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	20.9 ± 0.05 m
Spin	5/2
Quadrupole Moment
Discovery Year	1952
Parity	+

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

¹⁴²Pm

Mass Number	142
Neutron Number	81
Relative Atomic Mass	141.912890982 ± 0.00002533 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	40.5 ± 0.5 s
Spin	1
Quadrupole Moment
Discovery Year	1959
Parity	+

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

¹⁴³Pm

Mass Number	143
Neutron Number	82
Relative Atomic Mass	142.910938068 ± 0.00000316 Da
G-Factor	1.52 ± 0.2
Abundance
Radioactivity	☢️ Radioactive
Half Life	265 ± 7 d
Spin	5/2
Quadrupole Moment
Discovery Year	1952
Parity	+

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

¹⁴⁴Pm

Mass Number	144
Neutron Number	83
Relative Atomic Mass	143.912596208 ± 0.000003126 Da
G-Factor	0.338 ± 0.028
Abundance
Radioactivity	☢️ Radioactive
Half Life	363 ± 14 d
Spin	5
Quadrupole Moment
Discovery Year	1952
Parity	-

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

¹⁴⁵Pm

Mass Number	145
Neutron Number	84
Relative Atomic Mass	144.912755748 ± 0.000003011 Da
G-Factor	1.52 ± 0.064
Abundance
Radioactivity	☢️ Radioactive
Half Life	17.7 ± 0.4 y
Spin	5/2
Quadrupole Moment	0.23 ± 0.08
Discovery Year	1951
Parity	+

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

¹⁴⁶Pm

Mass Number	146
Neutron Number	85
Relative Atomic Mass	145.91470224 ± 0.000004589 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.53 ± 0.05 y
Spin	3
Quadrupole Moment
Discovery Year	1960
Parity	-

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

¹⁴⁷Pm

Mass Number	147
Neutron Number	86
Relative Atomic Mass	146.915144944 ± 0.000001382 Da
G-Factor	0.73714285714286 ± 0.02
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.6234 ± 0.0002 y
Spin	7/2
Quadrupole Moment	0.74 ± 0.2
Discovery Year	1947
Parity	+

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

¹⁴⁸Pm

Mass Number	148
Neutron Number	87
Relative Atomic Mass	147.917481091 ± 0.000006108 Da
G-Factor	2.1 ± 0.2
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.368 ± 0.007 d
Spin	1
Quadrupole Moment	0.2 ± 0.2
Discovery Year	1947
Parity	-

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

¹⁴⁹Pm

Mass Number	149
Neutron Number	88
Relative Atomic Mass	148.918341507 ± 0.000002344 Da
G-Factor	0.94285714285714 ± 0.14285714285714
Abundance
Radioactivity	☢️ Radioactive
Half Life	53.08 ± 0.05 h
Spin	7/2
Quadrupole Moment
Discovery Year	1947
Parity	+

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

¹⁵⁰Pm

Mass Number	150
Neutron Number	89
Relative Atomic Mass	149.920990014 ± 0.000021504 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.698 ± 0.015 h
Spin	1
Quadrupole Moment
Discovery Year	1952
Parity	-

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

¹⁵¹Pm

Mass Number	151
Neutron Number	90
Relative Atomic Mass	150.921216613 ± 0.000004949 Da
G-Factor	0.72 ± 0.08
Abundance
Radioactivity	☢️ Radioactive
Half Life	28.4 ± 0.04 h
Spin	5/2
Quadrupole Moment	2.2 ± 0.9
Discovery Year	1952
Parity	+

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

¹⁵²Pm

Mass Number	152
Neutron Number	91
Relative Atomic Mass	151.923505185 ± 0.000027809 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.12 ± 0.08 m
Spin	1
Quadrupole Moment
Discovery Year	1958
Parity	+

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

¹⁵³Pm

Mass Number	153
Neutron Number	92
Relative Atomic Mass	152.924156252 ± 0.000009729 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.25 ± 0.02 m
Spin	5/2
Quadrupole Moment
Discovery Year	1962
Parity	-

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

¹⁵⁴Pm

Mass Number	154
Neutron Number	93
Relative Atomic Mass	153.926712791 ± 0.000026861 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.68 ± 0.07 m
Spin	4
Quadrupole Moment
Discovery Year	1958
Parity	+

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

¹⁵⁵Pm

Mass Number	155
Neutron Number	94
Relative Atomic Mass	154.928136951 ± 0.000005065 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	41.5 ± 0.2 s
Spin	5/2
Quadrupole Moment
Discovery Year	1982
Parity	-

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

¹⁵⁶Pm

Mass Number	156
Neutron Number	95
Relative Atomic Mass	155.931114059 ± 0.000001275 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	27.4 ± 0.5 s
Spin	4
Quadrupole Moment
Discovery Year	1986
Parity	+

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

¹⁵⁷Pm

Mass Number	157
Neutron Number	96
Relative Atomic Mass	156.933121298 ± 0.000007521 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	10.56 ± 0.1 s
Spin	5/2
Quadrupole Moment
Discovery Year	1987
Parity	-

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

¹⁵⁸Pm

Mass Number	158
Neutron Number	97
Relative Atomic Mass	157.936546948 ± 0.000000953 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.8 ± 0.5 s
Spin	0
Quadrupole Moment	0
Discovery Year	1987
Parity	+

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

¹⁵⁹Pm

Mass Number	159
Neutron Number	98
Relative Atomic Mass	158.939286409 ± 0.000010777 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.49 ± 0.13 s
Spin	5/2
Quadrupole Moment
Discovery Year	1998
Parity	-

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

¹⁶⁰Pm

Mass Number	160
Neutron Number	99
Relative Atomic Mass	159.943215272 ± 0.0000022 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	725 ± 57 ms
Spin	6
Quadrupole Moment
Discovery Year	2012
Parity	-

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

¹⁶¹Pm

Mass Number	161
Neutron Number	100
Relative Atomic Mass	160.946229837 ± 0.0000097 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.05 ± 0.15 s
Spin	5/2
Quadrupole Moment
Discovery Year	2012
Parity	-

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

¹⁶²Pm

Mass Number	162
Neutron Number	101
Relative Atomic Mass	161.950574 ± 0.000322 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	630 ± 180 ms
Spin	2
Quadrupole Moment
Discovery Year	2012
Parity	+

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

¹⁶³Pm

Mass Number	163
Neutron Number	102
Relative Atomic Mass	162.953881 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	255 ± 25 ms
Spin	5/2
Quadrupole Moment
Discovery Year	2012
Parity	-

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

¹⁶⁴Pm

Mass Number	164
Neutron Number	103
Relative Atomic Mass	163.958819 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	5
Quadrupole Moment
Discovery Year	2018
Parity	-

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

¹⁶⁵Pm

Mass Number	165
Neutron Number	104
Relative Atomic Mass	164.96278 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	5/2
Quadrupole Moment
Discovery Year	2018
Parity	-

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
Natural Abundance (Oceans)
Natural Abundance (Human Body)	0 %
Natural Abundance (Meteor)	0 %
Natural Abundance (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

Also Known As

Pm
element 61
61Pm

Translations

Frenchprométhium
Italianpromezio
Spanishprometio
GermanPromethium
Amharicፕሮሜቲየም
Arabicبروميثيوم
AzerbaijaniPrometium
BelarusianПраметый
Bulgarianпрометий
Banglaপ্রমিথিয়াম
Bosnianprometij
Catalanprometi
CorsicanPromeziu
Czechpromethium
ChuvashПромети
WelshPromethiwm
Danishpromethium
Greekπρομήθειο
Esperantoprometio
EstonianPromeetium
Basqueprometio
Persianپرومتیم
Finnishprometium
FriulianPrometi
Irishpróiméitiam
GalicianPromecio
ManxPromaiçhum
Hakka Chinesepromethium
Hebrewפרומתיום
Hindiप्रोमीथियम
Fiji HindiPromethium
CroatianPrometij
Hungarianprométium
Armenianպրոմեթիում
Interlinguapromethium
Indonesianprometium
Idoprometio
Japaneseプロメチウム
Lojbanfagycevjinme
JavanesePrometium
Georgianპრომეთიუმი
Kannadaಪ್ರೊಮೆಥಿಯಮ್
Korean프로메튬
KomiПрометий
Latinpromethium
LuxembourgishPromethium
LigurianPromesio
LithuanianPrometis
Latvianprometijs
Malayalamപ്രൊമിതിയം
Marathiप्रोमेथियम
Western MariПрометий
MalayPrometium
Burmeseပရိုမီသီယမ်
Dutchpromethium
Norwegian Nynorskpromethium
Polishpromet
pnbپرومتھیم
Portuguesepromécio
QuechuaPrometyu
Romanianpromețiu
Russianпрометий
SakhaПрометиум
Sicilianprumezziu
Serbo-CroatianPrometijum
Slovakprométium
SlovenianPrometij
Serbianпрометијум
Saterland FrisianPromethium
Swedishprometium
Tamilபுரோமித்தியம்
Thaiโพรมีเทียม
TurkishPrometyum
Uyghurجۈي
Ukrainianпрометій
UrduPromethium
VepsPrometii
Vietnamesepromethi
WarayPrometyo
KalmykПрометиүм
YorubaPromethium
Chinese钷
Norwegian Bokmålpromethium
BretonPrometiom
CebuanoPrometyo
Macedonianпрометиум
Central Kurdishپرۆمیتیۆم
Gujaratiપ્રોમેથિયમ
TagalogPrometyo
Odiaପ୍ରୋମେଥିଅମ
PiedmontesePromessi
TatarПрометий
Cantonese鉕
Belarusian (Taraskievica orthography)Прамэт
AlbanianPrometiumi
UzbekPrometiy
Newariप्रोमेथियम
AromanianPromețiu
KyrgyzПрометий
Sanskritप्रोमेथियम
Malteseprometju
LimburgishPromethium
Scottish GaelicPrometium
Portuguese (Brazil)promécio
Nepaliप्रोमेथियम
Paliप्रोमेथियम
Teluguప్రోమిథియం
cdoPromethium
Min Nan ChinesePromethium
Bhojpuriप्रोमेथियम
AsturianPrometiu
Literary Chinese鉕
Tajikпрометий
Lingua Franca Novaprometio
AfrikaansPrometium
Mongolianпромети
kbpPrɔmɛtɩyɔm
oloPrometii
Northern FrisianPromeetium
Volapükprometin
Chinese (Traditional)鉕
Chinese (Taiwan)鉕
OccitanPromèti
KazakhПрометий
LombardPromesio
SardinianPromètiu
SwahiliPromethi
Wu Chinese钷
English (United Kingdom)promethium
Moroccan Arabicپروميثيوم
BashkirПрометий
Egyptian Arabicبروميثيوم
Pashtoپروميتيوم
Manipuriꯄ꯭ꯔꯣꯃꯦꯊꯤꯌꯝ
CornishPromethiom
BalineseProméthium
IcelandicPrómetín
Punjabiਪ੍ਰੋਮੀਥੀਅਮ

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
USGS Thesaurus ID	1546
WordNet 3.1 Synset ID	14675658-n

Promethium (Pm)

Properties

Isotopes of Promethium

126Pm

127Pm

128Pm

129Pm

130Pm

131Pm

132Pm

133Pm

134Pm

135Pm

136Pm

137Pm

138Pm

139Pm

140Pm

141Pm

142Pm

143Pm

144Pm

145Pm

146Pm

147Pm

148Pm

149Pm

150Pm

151Pm

152Pm

153Pm

154Pm

155Pm

156Pm

157Pm

158Pm

159Pm

160Pm

161Pm

162Pm

163Pm

164Pm

165Pm