Prometiy
61
Pm
Guruh
Nomaʼlum
Davr
6
Blok
f
Protonlar
Elektronlar
Neytronlar
61
61
84
Umumiy xususiyatlar
Atom raqami
61
Atom massasi
[145]
Mass raqami
145
Turkum
Lantanoidlar
Ranggi
Kumush
Radioaktivlik
Ha
Named after the Greek Prometheus, who, according to mythology, stole fire from heaven
Kristall tuzilma
Nomaʼlum
Tarix
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.
Qobiqdagi elektronlar soni
2, 8, 18, 23, 8, 2
Elektron konfiguratsiyasi
[Xe] 4f5 6s2
Promethium is the only lanthanide that has no stable isotopes
Jismoniy xususiyatlar
Faza
Qattiq modda
Zichlik
7,26 g/cm3
Erish harorati
1315,15 K | 1042 °C | 1907,6 °F
Qaynash harorati
3273,15 K | 3000 °C | 5432 °F
Eritish issiqligi
7,7 kJ/mol
Bugʻlanish issiqligi
290 kJ/mol
Solishtirma issiqlik sigʻimi
- J/g·K
Yer po‘stidagi miqdori
Nomaʼlum
Olamdagi miqdori
Nomaʼlum
Rasm manbalari: Wikimedia Commons (Geomartin)
Pitchblende, a uranium ore and the host for most of Earth's promethium
CAS raqami
7440-12-2
PubChem CID raqami
Nomaʼlum
Atom xususiyatlari
Atom radiusi
183 pm
Kovalentlik radiusi
199 pm
Elektrmanfiylik
-
Ionlashish potensiali
5,582 eV
Molyar hajm
22,39 cm3/mol
Issiqlik oʻtkazuvchanlik
0,179 W/cm·K
Oksidlanish darajasi
3
Qo‘llanilish sohalari
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
Izotoplar
Barqaror izotoplar
-Beqaror 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