Америциум

95
Am
Група
Нема одговор
Периода
7
блок
f
Protons
Electrons
Neutrons
95
95
148
Општи Својства
Атомски број
95
Атомска тежина
[243]
Mass Number
243
Category
Актиноид
Color
Silver
Radioactive
Да
Named after America
Кристална структура
Simple Hexagonal
History
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.
Electrons per shell
2, 8, 18, 32, 25, 8, 2
Електронска конфигурација
[Rn] 5f7 7s2
Am
Americium often enters landfills from discarded smoke detectors
Физички Својства
Фаза
Solid
Густина
13,69 g/cm3
Точка на топење
1449,15 K | 1176 °C | 2148,8 °F
Точка на вриење
2880,15 K | 2607 °C | 4724,6 °F
Топлина на топење
Нема одговор
Топлина на испарување
Нема одговор
Specific Heat Capacity
-
Abundance in Earth's crust
Нема одговор
Abundance in Universe
Нема одговор
A
Кредити на слика: Wikimedia Commons (Bionerd)
A small disc of Am-241 under the microscope
CAS Number
7440-35-9
PubChem CID Number
Нема одговор
Атомски Својства
Атомски полупречник
173 pm
Ковалентен полупречник
180 pm
Електронегативност
1,3 (Полингова скала)
Ionization Potential
5,9738 eV
Atomic Volume
17,78 cm3/mol
Thermal Conductivity
0,1 W/cm·K
Oxidation States
2, 3, 4, 5, 6
Applications
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 is harmful due to its radioactivity
Isotopes
Stable Isotopes
-
Unstable Isotopes
229Am, 231Am, 232Am, 233Am, 234Am, 235Am, 236Am, 237Am, 238Am, 239Am, 240Am, 241Am, 242Am, 243Am, 244Am, 245Am, 246Am, 247Am, 248Am, 249Am