Prometyum
61
Pm
Grup
yok
Periyot
6
Blok
f
Protonlar
Elektronlar
Nötronlar
61
61
84
Temel Özellikleri
Atom numarası
61
Atom ağırlığı
[145]
Kütle Numarası
145
Kategori
Lantanit
Renk
Gümüşi
Radyoaktif
Evet
Named after the Greek Prometheus, who, according to mythology, stole fire from heaven
Kristal yapısı
yok
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 23, 8, 2
Elektron dizilimi
[Xe] 4f5 6s2
Promethium is the only lanthanide that has no stable isotopes
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
7,26 g/cm3
Ergime noktası
1315,15 K | 1042 °C | 1907,6 °F
Kaynama noktası
3273,15 K | 3000 °C | 5432 °F
Ergime ısısı
7,7 kJ/mol
Buharlaşma ısısı
290 kJ/mol
Isı kapasitesi
-
Dünya kabuğundaki bulunulabilirliği
yok
Evrendeki bulunulabilirliği
yok
Resim kaynağı: Wikimedia Commons (Geomartin)
Pitchblende, a uranium ore and the host for most of Earth's promethium
CAS Numarası
7440-12-2
PubChem CID Numarası
yok
Atom Özellikleri
Atom yarıçapı
183 pm
Kovalent yarıçapı
199 pm
Elektronegatifliği
-
İyonlaşma enerjisi
5,582 eV
Atomik Hacim
22,39 cm3/mol
Isıl iletkenlik
0,179 W/cm·K
Yükseltgenme seviyeleri
3
Uygulamalar
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
İzotoplar
Kararlı izotoplar
-Kararsız izotoplar
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