Америцијум
95
Am
Група
н/д
Периода
7
Блок
f
Протони
Електрони
Неутрони
95
95
148
Општа својства
Атомски број
95
Атомска маса
[243]
Масени број
243
Категорија
Актиноиди
Боја
Сребрена
Радиоактиван
Да
Named after America
Кристална структура
Једноставни Хескагонал
Историја
Americium-241 was first identified in 1944 by Glenn T. Seaborg, Ralph A. James, Leon O. Morgan and Albert Ghiorso at the metallurgical laboratory at the University of Chicago.
It was produced by irradiating plutonium with neutrons during the Manhattan Project.
Americium was first isolated as a pure compound by Burris Cunningham in 1945, at the University of Chicago.
It was produced by irradiating plutonium with neutrons during the Manhattan Project.
Americium was first isolated as a pure compound by Burris Cunningham in 1945, at the University of Chicago.
Електрони по љусци
2, 8, 18, 32, 25, 8, 2
Електронска конфигурација
[Rn] 5f7 7s2
Americium often enters landfills from discarded smoke detectors
Физичка својства
Стање
Чвсрто
Густина
13,69 g/cm3
Температура топљења
1449,15 K | 1176 °C | 2148,8 °F
Температура кључања
2880,15 K | 2607 °C | 4724,6 °F
Топлота топљења
н/д
Топлота испаравања
н/д
Специфична топлота
-
Заступљеност у Земљиној кори
н/д
Заступљеност у Космосу
н/д
CAS број
7440-35-9
ПубЦхем ЦИД број
н/д
Атомска својства
Атомски радијус
173 pm
Ковалентни радијус
180 pm
Електронегативност
1,3 (Полингова скала)
Јонизујући потенцијал
5,9738 eV
Молска запремина
17,78 cm3/mol
Топлотна проводљивост
0,1 W/cm·K
Оксидациона стања
2, 3, 4, 5, 6
Примена
Americium is used in commercial ionization chamber smoke detectors, as well as in neutron sources and industrial gauges.
Americium-241 has been used as a portable source of both gamma rays and alpha particles for a number of medical and industrial uses.
It is also used as a target material in nuclear research to make even heavier elements.
Americium-241 has been used as a portable source of both gamma rays and alpha particles for a number of medical and industrial uses.
It is also used as a target material in nuclear research to make even heavier elements.
Americium is harmful due to its radioactivity
Изотопи
Стабилни изотопи
-Нестабилни изотопи
229Am, 231Am, 232Am, 233Am, 234Am, 235Am, 236Am, 237Am, 238Am, 239Am, 240Am, 241Am, 242Am, 243Am, 244Am, 245Am, 246Am, 247Am, 248Am, 249Am