Prometium
61
Pm
Groep
n/a
Periode
6
Blok
f
Protrone
Elektrone
Neutrone
61
61
84
Algemene Eienskappe
Atoom Nommer
61
Atoommassa
[145]
Massa Nommer
145
Kategorie
Lantaniede
Kleur
Silver
Radioaktief
Ja
Named after the Greek Prometheus, who, according to mythology, stole fire from heaven
Kristalstruktuur
n/a
Geskiendenis
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.
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.
Elektrone per skil
2, 8, 18, 23, 8, 2
Elektronkonfigurasie
[Xe] 4f5 6s2
Promethium is the only lanthanide that has no stable isotopes
Fisiese Eienskappe
Fase
Soliede
Digtheid
7,26 g/cm3
Smeltpunt
1315,15 K | 1042 °C | 1907,6 °F
Kookpunt
3273,15 K | 3000 °C | 5432 °F
Heat of Fusion
7,7 kJ/mol
Heat of Vaporization
290 kJ/mol
Spesifieke Hitte Kapasiteit
-
Oorvloed in die aardkors
n/a
Oorvloed in die heelal
n/a
Beeld Krediete: Wikimedia Commons (Geomartin)
Pitchblende, a uranium ore and the host for most of Earth's promethium
CAS Nommer
7440-12-2
PubChem CID Nommer
n/a
Atomiese Eienskappe
Atoom radius
183 pm
Kovalente Radius
199 pm
Elektronegatiewiteit
-
Ionisasie potensiaal
5,582 eV
Atoom volume
22,39 cm3/mol
Termiese geleidingsvermoë
0,179 W/cm·K
Oksidasiestate
3
Toepassings
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.
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.
Promethium is harmful due to its radioactivity
Isotope
Stabiele Isotope
-Onstabiele Isotope
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