Template:Infobox promethium

Promethium, ₆₁Pm

Promethium
Pronunciation	/proʊˈmiːθiəm/ ​(proh-MEE-thee-əm)
Appearance	metallic
Mass number	[145]
Promethium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson – ↑ Pm ↓ Np neodymium ← promethium → samarium
Atomic number (Z)	61
Group	group n/a
Period	period 6
Block	f-block
Element category	f-block
Electron configuration	[Xe] 4f5 6s2
Electrons per shell	2, 8, 18, 23, 8, 2
Physical properties
Phase at STP	solid
Melting point	1315 K ​(1042 °C, ​1908 °F)
Boiling point	3273 K ​(3000 °C, ​5432 °F)
Density (near r.t.)	7.26 g/cm3
Heat of fusion	7.13 kJ/mol
Heat of vaporization	289 kJ/mol
Atomic properties
Oxidation states	+2, +3 (a mildly basic oxide)
Electronegativity	Pauling scale: 1.13 (?)
Ionization energies	1st: 540 kJ/mol 2nd: 1050 kJ/mol 3rd: 2150 kJ/mol
Atomic radius	empirical: 183 pm
Covalent radius	199 pm
Spectral lines of promethium
Other properties
Natural occurrence	from decay
Crystal structure	​double hexagonal close-packed (dhcp)
Thermal expansion	9.0 µm/(m·K) (at r.t.)
Thermal conductivity	17.9 W/(m·K)
Electrical resistivity	est. 0.75 µΩ·m (at r.t.)
Magnetic ordering	paramagnetic
Young's modulus	α form: est. 46 GPa
Shear modulus	α form: est. 18 GPa
Bulk modulus	α form: est. 33 GPa
Poisson ratio	α form: est. 0.28
CAS Number	7440-12-2
History
Discovery	Chien Shiung Wu, Emilio Segrè, Hans Bethe (1942)
First isolation	Charles D. Coryell, Jacob A. Marinsky, Lawrence E. Glendenin (1945)
Named by	Grace Mary Coryell (1945)
Main isotopes of promethium
Iso­tope Abun­dance Physics:Half-life (t1/2) Decay mode Pro­duct 145Pm trace 17.7 y ε 145Nd 146Pm syn 5.53 y ε 146Nd β− 146Sm 147Pm trace 2.6234 y β− 147Sm

Pm data m.p. cat
	in	calc from C	diff	report	ref
C	1042	—	—
K	1315	1315	0
F	1908	1908	0
max precision	0
WD
input	C: 1042, K: 1315, F: 1908
comment

Pm data b.p. cat
	in	calc from C	diff	report	ref
C	3000	—	—
K	3273	3270	3
F	5432	5430	2
max precision	0
WD
input	C: 3000, K: 3273, F: 5432
comment

PTChemistry:promethium

Nd ← i'box Nd	iso61Pm  infobox  isobox	→ Sm i'box Sm
Commons  Wikidata:Q1809  Wiktionary Indexes in PT: § below · Page

[]  Data sets read by {{Infobox element}}
Name and identifiers
Top image (caption, alt)
Pronunciation
Category (enwiki)
Standard atomic weight
most stable isotope
Natural occurrence
Phase at STP
Chemistry:Oxidation states
Spectral lines image
Physics:Electron configuration (cmt, ref)
Term symbol * (cmt, ref)
Wikidata *
* Not used in {{Infobox element}} (2019-02-03) See also {{Infobox element/symbol-to--navbox}}

References

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