Прометиум
61
Pm
Група
Нема одговор
Периода
6
блок
f
Протони
Електрони
Неутрони
61
61
84
Општи Својства
Атомски број
61
Атомска тежина
[145]
Масен број
145
Категорија
Лантаноид
Боја
Сребро
Радиоактивно
Да
Named after the Greek Prometheus, who, according to mythology, stole fire from heaven
Кристална структура
Нема одговор
Историја
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.
Електрони на орбитала
2, 8, 18, 23, 8, 2
Електронска конфигурација
[Xe] 4f5 6s2
Promethium is the only lanthanide that has no stable isotopes
Физички Својства
Фаза
Цврста состојба
Густина
7,26 g/cm3
Точка на топење
1315,15 K | 1042 °C | 1907,6 °F
Точка на вриење
3273,15 K | 3000 °C | 5432 °F
Топлина на топење
7,7 kJ/mol
Топлина на испарување
290 kJ/mol
Специфичен топлински капацитет
-
Обилност во Земјината кора
Нема одговор
Обилност во Универзумот
Нема одговор
Кредити на слика: Wikimedia Commons (Geomartin)
Pitchblende, a uranium ore and the host for most of Earth's promethium
CAS број
7440-12-2
PubChem CID број
Нема одговор
Атомски Својства
Атомски полупречник
183 pm
Ковалентен полупречник
199 pm
Електронегативност
-
Јонизациски потенцијал
5,582 eV
Атомски волумен
22,39 cm3/mol
Топлинска спроводливост
0,179 W/cm·K
Оксидациски состојби
3
Примени
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
Изотопи
Стабилни изотопи
-Нестабилни изотопи
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