Prometiy

61
Pm
Guruh
Nomaʼlum
Davr
6
Block
f
Protonlar
Elektronlar
Neytronlar
61
61
84
General Properties
Atom raqami
61
Atom massasi
[145]
Mass Number
145
Turkum
Lantanoidlar
Ranggi
Silver
Radioaktivlik
Ha
Named after the Greek Prometheus, who, according to mythology, stole fire from heaven
Crystal Structure
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.
Electrons per shell
2, 8, 18, 23, 8, 2
Elektron konfiguratsiyasi
[Xe] 4f5 6s2
Pm
Promethium is the only lanthanide that has no stable isotopes
Physical Properties
Phase
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
Heat of Fusion
7,7 kJ/mol
Heat of Vaporization
290 kJ/mol
Solishtirma issiqlik sigʻimi
-
Abundance in Earth's crust
Nomaʼlum
Abundance in Universe
Nomaʼlum
Pitchblende,
Image Credits: Wikimedia Commons (Geomartin)
Pitchblende, a uranium ore and the host for most of Earth's promethium
CAS Number
7440-12-2
PubChem CID Number
Nomaʼlum
Atomic Properties
Atom radiusi
183 pm
Kovalentlik radiusi
199 pm
Elektrmanfiylik
-
Ionization Potential
5,582 eV
Molyar hajm
22,39 cm3/mol
Issiqlik oʻtkazuvchanlik
0,179 W/cm·K
Oksidlanish darajasi
3
Applications
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 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